6 Best Probiotics for Dogs With Diarrhea and Allergies Rated
Why Are Probiotics Important for Your Dog's Health?
Let’s face it. Dogs eat all kinds of nasty things when we aren't looking. In fact, gastrointestinal disorders are the second most common health issue for dogs after skin conditions according to Pet WebMD. When Fido is having emergency gastrointestinal issues (non-life threatening), a good dose of dog-approved probiotics can quickly correct loose stool and diarrhea.
Whether your dog suffers from ongoing food allergies or gas and the occasional upset stomach, probiotics are a natural and healthy way to replenish good gut flora in the digestive system. The health of the gut is recognized as an important component for the overall health of the immune system, and probiotics work by introducing beneficial bacterial strains into the intestinal tract. Good gut health allows the intestines to remove toxins from the body, and specific bacteria aid in the absorption of beneficial nutrients.
Owner reviews also demonstrate that probiotics can alleviate many canine skin disorders. As the market for canine supplements is burgeoning, we took a look at some of the top-rated probiotics for dogs on the market as well as some natural remedies for diarrhea; we ranked them according to efficacy, palatability and expense.
How to Choose the Best Probiotic Supplement for Your Dog
When selecting probiotics for your canine companion, keep the following criteria in mind:
- Species and Strain: The list of ingredients should indicate the specific bacterial species and strain, such as Lactobacillus acidophilus.
- Guaranteed CFU: The label should guarantee the number of colony-forming units (CFU) in millions or billions per gram. CFU is an estimate of viable bacterial or fungal numbers that the manufacturer guarantees will exist in their product.
- Customer Service Contact: The product packaging or manufacturer’s website should have a customer service number so you can contact them with any questions.
- Expiration Date and Storage Recommendations: The product should have a "best before" or expiration date. Storage time and conditions (i.e., excessive heat or cold) can reduce the viability of some bacterial strains. It is best practice to store your probiotics in a refrigerator.
1. Purina FortiFlora: The #1 Selling Dog Probiotic
Frequently recommended and sold by veterinarians, Purina FortiFlora Canine Nutritional Supplement is the number one selling probiotic for canines and our number one recommendation for dogs who suffer from occasional digestive issues such as loose stool and diarrhea. This supplement can safely be used on pregnant and lactating bitches as well as young puppies.
Reviews indicate that dog owners have observed high palatability for picky eaters and firm stool. This product regularly resolves IBS symptoms, sensitive stomach issues and chronic soft stool. Whelping bitches that are deficient in iron or may have overindulged in nutrient-rich placenta will benefit from this probiotic. Why? Probiotics aid in both the absorption of iron and the reversal of iron-toxicity damage in the gut, according to one such study on mice by the College of Food Science and Engineering.
Ingredients: Animal digest, Enterococcus faecium, L-ascorbyl-2-polyphosphate (source of vitamin C), vitamin E supplement, zinc proteinate, beta-carotene, salt, manganese proteinate, ferrous sulfate, copper proteinate, calcium iodate, sodium selenite.
When dispensed by veterinarians, this can be an expensive product. However, if purchased online through Amazon and other retailers, the sachets (foil packages of powdered product) cost approximately $0.93 a piece ($27.99 per 30-sachet package). This can still be an expensive daily addition if you have more than one dog needing a probiotic on a daily basis. Also, this product does not contain many strains of bacteria; if you are seeking to curb food allergies or skin conditions, you should try the VetriScience probiotic first. We recommend this product as a quick fix for diarrhea, but not as a product to improve gut health and the immune system on an ongoing basis.
2. Pet Ultimates: The #1 Selling Probiotic for Canine Allergies, Skin and Ear Infections
While Pet Ultimates Probiotics for Dogs scores well for firming up stool, it gets its highest marks for resolving chronic skin allergies and infections. From itchy skin and excessive licking to hair loss and staph infections, this product has helped clear up skin issues, promote hair regrowth and diminish tear stains.
Pet Ultimates guarantees 22 strains of probiotics in their flavorless powder supplement, which is made in the USA. They offer great customer service and back up their product with a 100% refundable guarantee—you even get to keep the product if you are not 100% satisfied with the results, so no need to ship it back. This is a company whose customer service is highly responsive to negative reviews. If you express any issues with clumping or palatability, they will quickly offer you a replacement.
comes with a quarter teaspoon scoop and approximately a 60-day supply. For large dogs, that is a dollar a day at $35.95 per container, making this one of the more expensive supplements. We give this product an "A." Their product falls slightly below perfect due to the high cost for large dogs but good value for small and medium-sized breeds. Pet Ultimates
Note: This commercial dog probiotic contains 22 species of probiotics at 2 billion CFUs. Still, this is half of what kefir milk offers in probiotics, however it is easy to administer with your dog's current feeding regime, and requires none of the maintenance that culturing kefir does.
Pet Ultimates Dosing
Dogs 50 lbs and under
Dogs 50 lbs and over
1/2 tsp or 2 (1/4 tsp)
3. VetriScience Laboratories: The #2 Selling Dog Probiotic
VetriScience Laboratories Probiotic Everyday Dogs Bite-Sized Soft Chews is our number one recommendation for dogs requiring a daily probiotic as a part of their overall health regimen. Very cost effective, it averages $10.99 for 60 chews on Amazon making it the best value. The VetriScience probiotic chews alleviate gas, loose stool, bad breath, tear staining (according to Pet WebMD) and yeast infections seen in the ears and skin. In fact, alleviating symptoms of extreme gas is this product's greatest achievement, and owners are duly gratified. Given the many conditions this probiotic has helped with, we give it an “A+” for all-around efficacy and value.
Ingredients: This chew contains 9 strains of bacteria at 286 million CFU/gram, including Bacillus subtilis, Bacillus coagulans, Lactobacillus acidophilus, Bifidobacterium thermophilum, Bifidobacterium longum, Lactobacillus fermentum, Lactobacillus casei, Bifidobacterium bifidum, and Enterococcus faecium.
Given as treats, these chews are highly palatable and most dogs look forward to receiving them. When paired with limited ingredient diets, this probiotic demonstrates excellent results. Old dogs with acute skin conditions and yeast infections respond exceedingly well. If you feed your dog a raw diet, these chews are the best solution for the delivery of a commercial probiotic product, as powders are difficult to administer on raw chicken quarters, etc. For dogs that do not find these chews tempting, powder and capsule forms are also available.
Small dogs (30 lbs and under)
Medium dogs (30-60 lbs)
Large dogs (60 lbs and over)
4. Dr. Mercola: The #3 Selling Probiotic for Pets
Dr. Mercola Complete Probiotics for Pets 90-Gram Powder can be safely used on both cats and dogs. In a multi-pet household with both cats and dogs, this product will not create any digestive issues for pets that crossover to their housemates' bowls. However, because of the large amount required per serving for larger dogs, this is not a cost-effective solution, although smaller dogs and cats benefit at a reasonable price.
Ingredients: Lactobacillus Acidophilus, Lactobacillus Casei, Lactobacillus Plantarum, Streptococcus Thermophilus, Saccharomyces Boulardii, Enterococcus Faecium, Lactobacillus Rhamnosus, Lactobacillus Bulgaricus, Bifidobacterium Lactis, Bifidobacterium Longum, Bifidobacterium Bifidum, Bifidobacterium Breve, Bifidobacterium Animalis and Lactobacillus Sporogenes (14 strains of bacteria). 38 billion CFU per scoop; acid and bile resistant.
Cat owners saw a substantial reduction in vomiting which is commonly seen in older cats. Dog owners saw a reduction in gas and bloating as well as a reduction in loose stool. Many owners were disappointed with the small quantity of product relative to the large container’s size. While this product does work well for smaller animal owners, we give it a “B” for value at $1.30 per serving for medium to large dogs.
Dr. Mercola Dosing
Species and Size
Cats (2+ lbs)
Toy Breed Dogs (up to 14 lbs)
Small Breed Dogs (15-29 lbs)
Medium Breed Dogs (30-49 lbs)
Large Breed Dogs (50-79 lbs)
Giant Breed Dogs (80+ lbs)
5. Probiotic Miracle: The #4 Selling Pet Probiotic Disappoints
Probiotic Miracle markets themselves as the number one selling canine probiotic. Our research indicates it is more likely the number four selling product on the market and well behind Purina, Pet Ultimate and VetriScience products. Consumers of this probiotic tout it for clearing up eye, skin and yeast conditions in addition to joint inflammation issues. A majority of users gave this product high ratings, although a small percentage reported a reduction in gas but ineffectiveness for other symptoms. Given that a small percentage of users had poor or mixed reviews, we would give it a “C+," however, the money-back guarantee (discussed below) bumps this product up to a “B-."
Ingredients: 2 billion CFU per serving, six strains of bacteria: L. acidophilus, B. animalis, L. rhamnosus, L. salivarius, L. fermentum, L. reuteri. Also contains pre-biotics. 100% natural, vegetarian, no gluten, no dairy, no soy, no fillers, no flavorings.
Probiotic Miracle does offer a 100% money-back guarantee, with guaranteed results against diarrhea, loose stool and yeast overgrowth. However, this product requires time to build up in the system and the guarantee expires 60 days from product shipment.
People with multiple dogs with gluten allergies and issues with loose stool and yeast-related problems may want to try this product before trying one of the more expensive ones. Keep an eye on the calendar if you want to take advantage of the money-back guarantee.
Probiotic Miracle Dosing
50 lbs and under
50 lbs and over
A majority of users gave this product high ratings, although a small percentage reported a reduction in gas but ineffectiveness for other symptoms. Despite the mixed reviews, we give this product a "B-" because of the money-back guarantee.
Kefir Grains for Inexpensive, Natural Probiotics for Dogs
6. Natural Probiotics: Kefir and Greek Yogurt for Dogs
Following a round of antibiotics, dog owners have long used a tablespoon of low-fat yogurt to readjust the bacteria in their dog’s intestines. Kefir, a super cousin of yogurt, is easy to make and packed with additional benefits; it is a low-cost and safe daily addition to your dog or puppy’s diet.
While similar in taste, Greek yogurt and Kefir have different bacterial qualities. Yogurt's bacteria is transient, meaning it temporarily adjusts the gut flora with one or two strains of bacteria. Kefir on the other hand, actually colonizes the gut with between 30-50 strains of bacteria. If you purchase kefir grains and make your own, it is much less expensive than pricey Greek yogurt.
Why Is Kefir so Beneficial?
Kefir contains minerals and essential amino acids that help the body with its natural healing processes, including tryptophan, which is among these essential amino acids. Tryptophan is well-known for its relaxing effect on the nervous system and may help calm high-drive or highly anxious dogs.
Kefir offers many health benefits and contains calcium and magnesium, both of which are critical for healthy nervous system function, so supplementation can have a particularly calming effect on the nerves. It is also rich in vitamins B12, B1 and vitamin K, promoting healthy looking skin, boosting energy and promoting longevity. It is high in probiotics and excellent at rebalancing intestinal bacteria, boosting immunity and correcting loose stool and diarrhea. Dogs who have suffered from Lyme disease have seen boosts in overall health and energy when kefir is added to their diet.
We recommend kefir as the best probiotic you can give your dog, garnering it an "A+" on the efficacy and value. If you have multiple dogs, regenerative kefir is the most affordable solution. It's natural, it works and it is easy to make. However, if you don't have the time to invest or find that making your own milk kefir is unappealing, we recommend the VetriScience probiotic supplement for the all-around health benefits it provides.
Canine Health Issues Survey
I am interested in probiotics because my dog has:
How to Make Kefir
- Glucosamine for Dogs the 5 Best Supplements Reviewed
Not all glucosamine supplements for dogs produce dramatic results. These 5 natural supplements provided the fastest and most noticeable relief for dogs with joint pain and arthritis without upsetting their stomachs.
- The Dirt on Why Your Dog and Your Neighbor Eats Dirt
Dirt eating among humans, dogs and other mammals occurs frequently across the globe. Is it a sign of mental or physical illness or is it an adaptive behavior that solves a physical need?
This article is accurate and true to the best of the author’s knowledge. It is not meant to substitute for diagnosis, prognosis, treatment, prescription, or formal and individualized advice from a veterinary medical professional. Animals exhibiting signs and symptoms of distress should be seen by a veterinarian immediately.
© 2013 Solaras