Why Your Dog Does Not Need a Heartworm Test Every Year

Updated on February 16, 2018
DrMark1961 profile image

Dr. Mark is a small animal veterinarian. He works mostly with dogs and exotic animals.

What Is Heartworm, and Why Is My Dog Tested?

Heartworm is a large internal parasite that is spread through the mosquito. Dogs with a case of heartworm disease start out with mild symptoms like coughing and exercise intolerance but later develop full blown cardiomyopathy (with swelling in the limbs, fluid buildup in the lungs, and reluctance to move as the dog becomes quickly exhausted).

Testing dogs from the shelter, older dogs that have never been on preventative, and dogs that have been off of preventative for a long time is really needed. Annual testing of dogs that are on heartworm preventative is not necessary, however. It is not harmful to the dog, only to your wallet, so unless you feel the need to test you should just keep your dog on the preventative.

Why Do Dogs Need to Be Tested Yearly?

Throughout my years in practice, including several years in some of the areas with the highest endemic heartworm populations the US (Mississippi valley), I never saw one dog test positive that was already on monthly heartworm preventative. I have never met a colleague who found a positive heartworm dog that was being treated with preventative.

So is heartworm testing a scam? Why are dogs already on preventative required to be tested? Several of the sites I found on a web search made the sort of recommendation we always gave in small animal practice. Dogs were required to be tested each year before their heartworm medication could be refilled.

(The stated reason for this was that dogs who received a dose of preventative while infected with heartworms could suffer a severe and potentially fatal reaction. This was the case when older preventatives were used, medications that were popular in the 1970s. If anyone has ever seen and documented a case like that I would like him to leave a comment.)

Vets make a profit on each test, certainly a lot more than in just dispensing the medicine. It does not harm the dog, just the owner, so there has been no outcry to stop the procedure.

Can I Keep My Dog on Preventative Without Testing?

Looking to avoid this issue and get a prescription so you can get your medication online? Dogs that did not have a current test could not receive a prescription from the vet. Most dog owners (at least those who do not own a pack) will find they are better off buying ivermectin tablets online. There are several sources of nonprescription medications available. Nuheart and Valuheart are generic ivermectin and when purchased through Canada do not need a prescription.

If you do own a lot of dogs and want to use the ivermectin available in feed stores I have to warn you that it is concentrated for use with large animals and a dog dose for heartworm prevention is very low.

Several sources on the internet give doses for ivermectin preventative that are absurd but the label on a common heartworm preventative is only 0.006 mg/kg, so a 20 kg dog will only be receiving 0.32mg. Since Ivomec is sold at 1%, or 10mg/cc, the 20 kg dog only needs less than 0.05cc.

The only way to get close to this dose is by using an insulin syringe; preferably one sold that holds only 0.5cc. For smaller dogs there is really no way to dose that low.

(One of my professors recommended diluting that tiny dose with sterile water and then putting it onto a biscuit before giving it to the dog--that way you are sure he is going to consume the medication)

That being said, ivermectin is used at a much higher dose when treating demodectic mange (0.3-0.6 mg/kg) and for a long time, an average of 3-8 months. It is quite safe even at those levels.

Can Ivermectin Cause Problems?

Owners of Collies, Shelties, OES, Aussies, and some other mixed breed dogs might be sensitive to ivermectin. If you are concerned in any way you can test for the mutation on the MDR1 gene that causes sensitivity. Testing is available through the Washington State University College of Veterinary Medicine. Of course these dogs can be given heartworm preventatives that do not utilize ivermectin (Revolution (selamectin) and Advantage multi (moxidectin) are both topical so treat fleas as well as preventing heartworm disease).

The drug companies who marketed the preventatives also recommended we tell clients not to buy a large dog dose and split it, as the medication might not be adequately mixed in the tablet and one of the dogs would not be medicated. (If this were the case it would be dangerous to prescribe one-half tablets of any medication.)

Is Heartworm The Most Important Health Issue?

If you choose not to go in for a heartworm test each year do not forget about your dog´s teeth. Many dogs die each year from the secondary effects of periodontal disease.

If you live in an area where heartworms are a danger to your dog, and do not have the income to spend on annual testing, at least spend what is necessary to prevent this disease in your dog.

Prevention is simple and inexpensive and untreated cases are terrible to observe.

My dog and her sister on the beach.
My dog and her sister on the beach. | Source

Questions & Answers

  • My five-year-old dog has been on Heartgard for years. I missed a few months of treatment, and his vet said it’s too dangerous to refill without testing. That could make worms resistant, apparently. My last vet vehemently disagrees with this assertion. Is it dangerous?

    Heartworms will not become resistant because you missed a few months. The dog may have become infected in that time, but it depends on how long the dog was off preventative and how long it has been since he stopped taking the meds. It takes about six months from the time is bitten by a positive mosquito until there are adult heartworms in the heart. The best thing to do would be to continue heartworm preventative and then test the dog later, at least six months after the time that he was off the preventative.

  • Is annual heartworm testing mandatory to purchase heartworm meds?

    Some vets will not give you a prescription for heartworm preventative until you have a test done. It is not mandatory in any state. If your vet does not want to give you a prescription, you can purchase the preventative online.

  • If I give my dog the ivermectin medicine and he has heartworms will he get sick and die?

    Preventative medication will kill the immature heartworms (microfilaria) in the blood, but it will not kill the adults. If the preventative is not given, the microfilaria will develop into adults and invade the heart. No, giving this preventative will not make him sick and die.

  • My puppy has been on Heartgard since she was four-months-old. My vet wants to do a heartworm test. Is this necessary?

    If this is her first spring, then there is virtually no chance that she is going to have heartworm disease.

    Unless you are living in an area where Heartgard resistant heartworms are found, I do not think it is necessary to have your dog tested at this time. (If you do live in an area where Ivermectin resistant heartworms are present, why was your puppy prescribed Heartgard?)

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    • DrMark1961 profile imageAUTHOR

      Dr Mark 

      2 weeks ago from The Atlantic Rain Forest, Brazil

      According to the sales rep from the companies that sell the heartworm preventative, it is not a good idea to cut the pill in half because the medication is distributed unevenly. This goes against everything I and other vets learned, since we routinely split larger pills when dealing with tiny dogs. It is up to you whether to believe Big Pharm or your vet.

      A tiny dog that is inside the house 95% of the time will probably never get exposed to heartworm. If he does, however, there will be serious medical consequences, perhaps even heart failure, from very few worms. (Their hearts are very small and the worms are large enough to block the vessels and lead to heart failure and death;) No one can make you get a heartworm test but in your case it is a good idea to have it done. It will probably be a waste of time but it might save your dogs.

    • profile image

      LJElrod 

      2 weeks ago

      I have two dogs (4 and 5 lb). I am concerned regarding giving heartworm prevention to such small dogs. Can I cut the pill in half? Also, my dogs are inside 95% of the time and I watch very carefully for mosquitoes. Must I get a heartworm test before giving ivermecxtin? Thanks very much.

    • DrMark1961 profile imageAUTHOR

      Dr Mark 

      7 weeks ago from The Atlantic Rain Forest, Brazil

      Maryanne, it is not a good idea to rely on the previous owners, even if they did say that the dog was vaccinated. Since you are not sure, your Chiweenie would be a lot better off if you had at least one series of vaccines. After that it is your call. I do not vaccinate yearly because adult dogs have long term immunity after being vaccinated. Some vets do not agree with this and continue to vaccinate yearly, as we were taught 40 years ago.

      As far as a heartworm test, it is a good idea to get your dog tested as soon as possible. You do not HAVE to get her tested before starting the preventative, but her heart is so small that even a few worms can lead to congestive heart failure. Get it taken care of as soon as you can.

      I hope you two have a great time together! Congrats.

    • profile image

      Maryanne 

      7 weeks ago

      I recently got a chiweenie she is four years old and I'm not sure of her medical history.My question is can I just start her on heartworm prevention or do I need to get her tested first and also I'm not sure when her last vaccinations were so what do you recommend.Thank you!

    • DrMark1961 profile imageAUTHOR

      Dr Mark 

      5 months ago from The Atlantic Rain Forest, Brazil

      Ryan, fecal exams are not mandatory, but if your dog is exposed to parasites a great deal (like running a lot in a dog park) you can take a stool sample in twice a year to have it checked. Take it in--you do not have to pay an office call just to have the stool checked for worm eggs.

    • profile image

      Ryan 

      5 months ago

      What about Fecal O&P tests every year?

    • DrMark1961 profile imageAUTHOR

      Dr Mark 

      5 months ago from The Atlantic Rain Forest, Brazil

      DVM, I kind of doubt that you have zero financial gain from the sale of prevention and testing. Are you really selling tests at cost?

    • profile image

      DVM 

      5 months ago

      I have several patients that have tested positive despite being on prevention. Testing allows us to catch those cases and treat appropriately. Even if adulticide treatment is not the best option for that pet and client, there are other options. Prevention for a HW positive dog is not a recommended course of treatment without concurrent use of doxycycline or similar. There are resistant strains of HW and testing is how we catch that. You are doing pets a disservice. And I’m a dvm but have zero financial gain from sale of prevention or testing. I recommend what is in my patients’ best interests.

    • profile image

      Avalon1000 

      13 months ago

      We live in San Diego and just performed a heartworm test in April 2017. We went back to the vet on June 09, 2017 due to an ear infection and they said we need to have a heartworm test again because we did not give heartworm preventive medicine since April. We have a Terrier mix and she stays in the house 99% of the time, is this correct or are they just bilking us?

    • profile image

      Nuus 

      15 months ago

      Testing every year when Ivermectin has been given on the same day of the month for the past 12 months is silly, and illogical:

      12 doses dispensed after the last test didn't hurt the dog, but the next dose might? Why not test between each dose if the medication given in the proper dose at the proper interval isn't sure to be effective? Why use the medicine if it doesn't actually work? Why has my dog's heartworm test been negative all these years of annual testing, but now it might not be?

    • DrMark1961 profile imageAUTHOR

      Dr Mark 

      16 months ago from The Atlantic Rain Forest, Brazil

      KNW, you sound like a rep from a heartworm testing company trying to sell us all on testing. If you really did have your dog on year round preventative he would not be dead, since that is the slow kill method of preventing a buildup of adult worms in the heart.

      You are not putting your dog at risk by not getting them tested every year.

    • profile image

      KNW 

      16 months ago

      My husband and I never once missed giving our dog his heartworm preventative. He turned up heartworm positive. My vet at the time did not test on an annual basis. We just happened to go to a different vet and the heartworms were found. Had we not, our dog would be dead by now. Your dog needs to be weighed and checked for heartworms every year. It is NOT a scam. You are putting your pet at risk by not getting them tested every year. It DOES happen.

    • profile image

      Jenny 

      16 months ago

      Thank you, Dr. Mark, for this informative post. I have four Chihuahuas, and recently moved to the East Coast (where I've been advised to use a heartworm preventative) from Los Angeles (where heartworm wasn't an issue at all). I've been purchasing Valuheart from a Canadian pet products website, per your recommendation, and find it to be easy and cost efficient. I'm glad to know I don't need to take my pack in for an annual heartworm test -- that's more money that can be spent on their annual dentals instead!

    • DrMark1961 profile imageAUTHOR

      Dr Mark 

      22 months ago from The Atlantic Rain Forest, Brazil

      Thanks for reading, other DVM. As you are probably aware, the major funders for heartwormsociety.org are the big pharmas that manufacture and sell the heartworm preventatives (Merial, for example.) I am sure you can see the danger in that.

      Many of the families I have come across in practice over the years cannot afford yearly testing and medications. They may be spending their money on children, rent, food, and other things, and I do not think they have to give up their pets because they cannot afford everything they are told to do. If they cannot afford yearly testing, they probably can afford to buy heartworm preventative from an online pharmacy,or maybe ivermectin sheep drench, which does not need to be diluted and can treat many dogs for less than a box of heartworm tablets.

      Thank you again for taking the time to share your views.

    • profile image

      otherdvm 

      22 months ago

      I encourage everyone who owns a dog or cat and also reads my comments to visit heartwormsociety.org.

      Heartworm disease is one of the most studied diseases in veterinary medicine, one of only a handful with a dedicated society of professionals and for which detailed guidelines for prevention, diagnosis, and treatment are available to the public.

      As a veterinarian, I have seen dogs who are on prevention test positive for Heartworm disease. Should you be one of the unfortunate few, testing annually allows you to catch it early in it's course, when treatment is much safer and the heart, arteries, and lungs have not been damaged. When your dog begins to show signs of illness due to Heartworm disease, it is in an advanced stage.

      Also, if you choose to purchase your own ivermectin and make your own solution, ivermectin does not mix with water, necessitating an alternate diluent, such as propylene glycol.

      I wish Dr. Mark the best in his professional endeavors, including this forum, just speaking out as one professional having a different perspective on educating the public regarding Heartworm disease.

    • profile image

      Buster's mom 

      22 months ago

      Hi My vet also charged for an office visi of $22 on top of the heart worm test! My dog has been going there for 3 years. Does anyone else's vets do this?

    • profile image

      Doug S. 

      23 months ago

      An important issue here is owner compliance. I will often ask if the patient has been on preventatives. We had a client recently who admitted they gave it once years ago, it didn't work, so they haven't given it since. Usually, they aren't as upfront. We also look at the Owner's body language when we ask. If they avert their eyes, hang their head, etc. can be signs of lying.

    • DrMark1961 profile imageAUTHOR

      Dr Mark 

      2 years ago from The Atlantic Rain Forest, Brazil

      dawnmha--your dog is more at risk because of where you live. Yes, the links are valid, but you should read the link about "How to avoid and prevent resistant heartworm" and consider another preventative instead of ivermectin. Leave me a not if you have any questions I can help you with.

    • profile image

      Dawnmha 

      2 years ago

      Hi, I do live in the Mississippi Valley. My vet is trying to do that to me and my prior vet did not. The link you provide for heartworm meds is legit right? I believe everything you say, but of course I am concerned about the safety of buying these pills for my dogs. Hope you can confirm their safety and effectiveness. Thanks

    • profile image

      tara 

      2 years ago

      I didn't bother reading the entire post, however I just feel it's obvious when a non medical person posts these types of things. Of course hw likely won't happen on prevention, but there are a lot of "what ifs".

      The medical profession - human and animal - has developed unfortunately out of need - necessity- and things have evolved because mistakes have been made.

      Medicine is more of a rule OUT things until you're left with the only outcome.

      By saying if you're on prevention therefore your dog doesn't need a test is not in the vein of good medicine. Likely you are right. But animals throw up, people think they dosed an animal and didn't. Hell, I have to use a pill caddy to give my cat his daily meds - I forget all the time!

      There are many known factors - vomiting, missed doses, late doses, incomplete doses etc. There are also other "unknown" factors as well.

      The big thing is that prevention can be damaging if you do have a heart worm infection. So yes, vets suggest testing yearly; not because they want money - trust me I've worked in the industry for 20 years and we are all not well off! Medical stuff is expensive.

      We want you to test because it's the best thing for your pet; and while we sample for Heart worm - tick and mosquito borne diseases - blood parasites - we also encourage other blood testing. We don't make money on this - the lab maybe. We suggest this because it's the best medicine. And I offer my pets what I'd want for myself or my children.

      Prevention is great - and necessary. Testing is too. Unfortunatley medicine is full of abnormal things - unheard of anomolies... as a medical person I know I'm tested until....until they figure stuff out. There is not a huge change of being infected with heartworm, but the testing also tests for tick born diseases as well - lyme, erlichia and others.

      Don't minimize the role medicine plays in maintaining good health.

    • DrMark1961 profile imageAUTHOR

      Dr Mark 

      3 years ago from The Atlantic Rain Forest, Brazil

      I appreciate your sharing this info on your Facebook. Ivermectin has been used since the 1980s, and is safe at the doses listed above. It is no change for most people since it is the active ingredient in heartgard, just a lot cheaper than the product sold through veterinary clinics. Here is some more info on ivermectin if you want to read more:

      http://www.merckmanuals.com/vet/pharmacology/anthe...

      Thanks again.

    • profile image

      Trena 

      3 years ago

      Thanks for this info! It would be helpful if you could provide references, though...for example, where can the factual info be found to support how ivermectin works etc. I don't disbelieve you, but I like to check out facts before making major changes affecting my pets' or family's health and it would save us a LOT of time if you already had the info referenced at the bottom of your articles. I posted to Facebook for you, as either way it's good information to provoke thought and inquiry rather than blindly trusting healthcare professionals who may not stay on top of the latest/best studies, and conversely get much of their information from drug reps! Thanks again!! :)

    • DrMark1961 profile imageAUTHOR

      Dr Mark 

      3 years ago from The Atlantic Rain Forest, Brazil

      Nicole, I do not want to pay Merial hundreds of dollars a year so that my dog can suffer through a painful heartworm treatment.

      No, testing is not necessary before starting ivermectin. Most of the vets and techs that tell you that your dog will die without testing are using the example of Filaribits. Those old scare tactics are morally reprehensible.

      Any drug can be fatal if given in the wrong amount. The proper doses are given, and people can administer it without worrying about paying a drug company for advertising.

      Yes, heartworm prevention is safe and affordable. Just not purchased from big Pharma.

    • profile image

      Nicole 

      3 years ago

      Actually the reason for the testing is the makers of the product. If an animal test positive and the owners have been using the product as directed than they will pay for the treatment. There is also an issue of compliance, owners may have purchased the heart worm prevention but that doesn't mean they are giving it correctly. Also there are some products if they are used and the animal is heart worm positive they can potentially kill the animal. Oral ivermectin can be fatal if not given the right amount, or if not given enough you are not doing any good. Heart worm prevention is actually very affordable and safe. If you are consistent with you giving your dog heart worm prevention, ask you veterinarian if you can do a heart worm test every 3 years, most are willing.

    • DrMark1961 profile imageAUTHOR

      Dr Mark 

      4 years ago from The Atlantic Rain Forest, Brazil

      Health Reports--your dogs are probably totally safe in Georgia, because as far as I know the resistant strain has only been found there one time. That being said, no one can guarantee your dogs will not become infected with the resistant strain since you live down south.

      If you want to use an alternative product, and can afford the extra cost, you should go ahead, but this is really your decision.

      I hope your dogs stay healthy! Let me know if I can be of any other assistance, but you should really read the Auburn info on the internet about this too.

    • Health Reports profile image

      Jane Wilson 

      4 years ago from Geogia

      Ah - we are in Georgia - I'll go find your other article. Thanks for the response!

    • DrMark1961 profile imageAUTHOR

      Dr Mark 

      4 years ago from The Atlantic Rain Forest, Brazil

      Health Reports

      Yes, there have been a few reports in isolated areas of the US--lower Mississippi and Louisiana, and a case from Georgia. (There are details in an article I wrote on "How to Avoid and Prevent Resistant Heartworm in Dogs".) If you live anywhere else, I really do not think it is even worth worrying about.

      As you pointed out in your article on HP, there are a lot of advantages to giving ivermectin year round as a slow kill method anyway. If you are treating with the slow kill method, and preventing Heartworm year round, the test is always going to be negative.

      Most people have limited money, and we spend what we can on our pets. I think the best thing to do is spend a little on sheep drench (ivermectin) and give it year round.

      Thanks for taking the time to read this.

    • Health Reports profile image

      Jane Wilson 

      4 years ago from Geogia

      Great article - thanks for posting it. My last vet tried to insist on a test before selling me the Heartgaurd. Her reasoning was that the FDA had recently detected that heartworms were becoming immune to preventatives. This was a couple of years ago, and I still have not heard of immunity becoming a problem in protecting dogs from heartworms. Have you heard anything like that?

    • DrMark1961 profile imageAUTHOR

      Dr Mark 

      4 years ago from The Atlantic Rain Forest, Brazil

      Hi bodylevive, since rabies shots are required by law you still have to take them in at the recommended time (1 or 3 years, depending on your state). The vax actually last a lot longer than that but if one of your dogs bit someone you could get in a lot of trouble if the rabies vax were not current.

    • bodylevive profile image

      BODYLEVIVE 

      4 years ago from Alabama, USA

      Thank you for all this information, I find it to be useful because I have two dogs that really put a dent into our pockets when we take them to the vet. We will be following your advice on some of the fixes for our dogs. I do agree that some preventative measures through the vet is really a rip off and I appreciate your honesty in what can be done at home. We still have to take them for rabbies shots?

    • gail641 profile image

      Gail Louise Stevenson 

      5 years ago from Mason City

      Heartworm is a terrible disease. My mother went with someone who'se dog had heartworm and the dog had to be put to sleep. The dog had wolf in him and he died a long time ago. I thought that the dog was on preventative medication, but he got the disease anyway and it was too late for him. I voted up.

    • DrMark1961 profile imageAUTHOR

      Dr Mark 

      5 years ago from The Atlantic Rain Forest, Brazil

      Thanks for leaving that comment! I was worried about that high dose!!! I just read a study from Auburn and they recommend slightly higher ivermectin doses, due to the development of some resistance. 0.4 cc would still be safe and provide an addittional 80micrograms of ivermectin.

      Thank you again for the comment. I appreciate your visit.

    • profile image

      Shelly 

      5 years ago

      Thanks for catching my typo on the dosage for Ivermectin for my Aussie, Dr. Mark. (One of the perils of my iPad) I should have typed .03ml dose:-(. I purchased a syringe without needle that will deliver that dose so don't worry about my middle aged eyesight tripping me up when my first purchase of sheep drench arrives this week!

      I am going to read your article about teeth brushing next since my guy has some issues.

      Shelly and Akilah's Sweetheart Porter aka Mr. P

    • DrMark1961 profile imageAUTHOR

      Dr Mark 

      5 years ago from The Atlantic Rain Forest, Brazil

      Yes, it is really unfortuante that veterinary practices feel the need to take advantage of those people who take the time to learn about the disease. Since heartworm preventative (ivermectin) works as a treatment, anyway, that refusal to refil the meds has absolutely no medical basis.

      Your Australian Shepherd only needs 0.3-0.4 ml of sheep drench, which is 240-320 micrograms. I put the doses in my article "heartworm prevention for less than 10 dollars a year"; it is so cheap that it is easy to keep a dog on year-round and never worry about this disease. 3.0 is a lot of ivermectin! I found a lot of recommendations on the internet forums but most of them were a lot higher than the amount of ivermectin contained in Heartgard.

      As long as the 3.0 ml dose is not hurting him, though, there is nothing wrong with it except that he is taking in a lot of insecticide each month. If he has any symptoms of ivermectin toxicity, like incoordination, you should give him less. Thanks you for your great comment. I apprectiate your visit.

    • profile image

      Shelly 

      5 years ago

      Hi Dr. Mark,

      Thanks for the information. I wanted to point out that you can buy .08% (diluted) Ivermectin (Sheep Drench) from several places on the internet including amazon.com. My 51 - 100 lb Australian Shepherd dog then needs a 3ml dose according to other forums. Yes, I did have him tested for sensitivity a few years ago. I am just very angry and disappointed with the vet for flat out refusing to re-fill the meds unless I have him tested (we live in Southern California - not a hotbed for heartworm) even though I have been buying the Heartgard (at a 100% mark-up) from them. For information, I went to the FDA's site for a neutral perspective. Since the test will only reveal the presence of adult heartworm, which takes 7 to 8 months to achieve, isn't it true that the "preventative" which is actually a poison that kills the larvae when already present, should keep a dog free of heartworm?

    • DrMark1961 profile imageAUTHOR

      Dr Mark 

      6 years ago from The Atlantic Rain Forest, Brazil

      Thank you all for taking the time to read and be concerned!

    • DrMark1961 profile imageAUTHOR

      Dr Mark 

      6 years ago from The Atlantic Rain Forest, Brazil

      According to the Heartworm society, yes. If there are any mosquitoes in your area it is theoretically possible, although it may be unlikely.

      Daughter of Maat, for safety sake she should be tested before starting the meds again, but the preventative should be started anyway, no matter what the test results show

    • Millionaire Tips profile image

      Shasta Matova 

      6 years ago from USA

      This is handy advice. Thanks! My vet doesn't require the test, but we don't live in the Mississippi valley. Should I still be giving her the heartworm treatment?

    • Daughter Of Maat profile image

      Melissa Flagg OSC 

      6 years ago from Rural Central Florida

      Fantastic hub. This is probably a stupid question, but should you give heartworm medication to a dog who has not been tested and who has been off heartworm medication for about a year and a half especially if the dog lives in Florida?

      Voted up and Shared all over!

    • Angela Brummer profile image

      Angela Brummer 

      6 years ago from Lincoln, Nebraska

      I am going to share this again with all the sources!

    • DrMark1961 profile imageAUTHOR

      Dr Mark 

      6 years ago from The Atlantic Rain Forest, Brazil

      Im glad it is useful for everyone. Just some more info--that bottle from Amazon will last about 3 years for a medium sized dog, so for anyone that needs it that is less than 10 dollars a year for heartworm protection

    • catgypsy profile image

      catgypsy 

      6 years ago from the South

      Very interesting article. I have wondered why the testing was necessary too. Thanks for the information!

    • rebeccamealey profile image

      Rebecca Mealey 

      6 years ago from Northeastern Georgia, USA

      Thanks so much for that website for the heart worm meds w/o a prescription.This is so useful for so many people, including me. Voted very useful and shared!

    • Angela Brummer profile image

      Angela Brummer 

      6 years ago from Lincoln, Nebraska

      This is really an amazing hub. I looks very professional. I have gotten this shared. Also, you should comment to the others and share their hubs and leave the ones you would like shared.

    • travel_man1971 profile image

      Ireno Alcala 

      6 years ago from Bicol, Philippines

      Here in the Philippines, the military officials with the help of health department administer such kind of dog treatment.

      In the farflung barangays or counties, stray dogs outnumber handful vet doctors in the nearest city.

      Although, animal rights is extensively promoted here and responsible pet ownership as well, still, the scenario on pet health care is not fully implemented yet.

      Dog treatment is always a case-to-case basis and it's for the owner who can afford such medication.

    • DrMark1961 profile imageAUTHOR

      Dr Mark 

      6 years ago from The Atlantic Rain Forest, Brazil

      That is somewhat akin to guaranteeing that your home in Iowa will never be struck by a tsunami.

    • Dragonrain profile image

      Dragonrain 

      6 years ago

      Interesting hub. I know someone who buys Heartgard online from Australia and has never had any issues doing so. I'm too paranoid to do anything like that myself. Plus, most heartworm preventative companies will refund your vet costs if your pet gets heartworm while on their product, but they apparently only do so if you bought your preventative meds directly from a vet.

      Some animal shelters and low cost clinics will offer heartworm testing for a fraction of the cost that you'd pay going to a regular vet. That way you can save some money, but still get a prescription for heartworm meds so that you can buy them from a vet.

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