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Signs of Allergies and Sickness in Hamsters

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Whitney is a hamster parent. She hates to see her furry friends suffer and enjoys educating others of best husbandry practices.

Do you know how to handle allergies in hamsters?

Do you know how to handle allergies in hamsters?

Allergies in Hamsters

Hamsters are usually pretty hardy animals, but they can have allergies to food, bedding, and other agents. The most common allergy for hamsters is going to be the bedding or another household agent—typically something that has been sprayed in the air.

Allergies are easy to remedy as all you need to do is remove the agent that the hamster is allergic to, but if you don't notice the signs of an allergy, then the allergy may develop into something more serious and severe. It's not uncommon for untreated allergies to turn into wet-tail or an infection due to a lowered immune system and stress on the body.

Hamsters can recover from the symptoms of an allergy pretty quickly, but you have to keep an eye on your hamster, as they generally do not show signs of weakness or illness until it's too late. If you change anything in or around your hamster's cage, you'll want to watch with a close eye.

Hamsters might be allergic to their bedding.

Hamsters might be allergic to their bedding.

Causes of Allergies

There are different causes of allergies. The most common causes of allergies include food, bedding, or another household item (smoke, perfume, furniture polish, etc.)

Hamster Food Allergy

Hamsters can be sensitive to changes in diet, which is why if you're going to change your hamster's food, you want to do so slowly. Introduce the new food into the old food little by little until you're able to completely ween the hamster onto the new food without any major health complications.

If your hamster isn't able to slowly get used to the new food, he may have trouble digesting the new food, which can cause a reaction. If you're just adding one or two new things to your hamster's diet and he starts to show any signs of reaction, remove them from the diet.

It's best to just keep your hamster on a regular hamster diet. You can try feeding them fresh fruits and vegetables as treats but only do one at a time. That way, if your hamster does have an allergic reaction, you know what food caused it.

Hamster Allergy to Bedding

There are many different types of bedding available for small animals. Typically, you want to avoid cedar and pine because of the strong oils that can cause respiratory illnesses. You should try to stick with aspen eco-straw pellets, recycled newspaper bedding (such as CareFresh), and other dust-free bedding choices.

If you think that the bedding is causing your hamster to be ill, remove the bedding and try using paper towels or toilet paper for some time to see if the symptoms go away or if they persist.

Other Household Allergens

If you feel like nothing has changed in the diet or bedding, and your hamster is not showing signs that he may have an allergy, then you should try to figure out if anything else in the room that the hamster's cage is in has changed.

Sometimes, hamsters may develop an allergy to aerosols, spray furniture polish, cigarette smoke, perfumes, air fresheners, and just about anything that is airborne. Hamsters have sensitive respiratory systems, so you want to be careful what you're putting in the air where your hamster spends most of his time.

Signs and Symptoms of Allergies

You may notice one or more of the following symptoms:

  • Dry skin
  • Hair loss
  • Irritated stomach
  • Persistent and frequent itching or dry skin
  • Red feet
  • Runny nose
  • Scratching
  • Skin irritation
  • Sneezing
  • Swollen feet
  • Watery eyes
  • Wheezing
  • White flakes around the eyes and ears

You will notice the signs of an allergy shortly after introducing the allergen.

Relieving Allergies and Veterinary Care

To soothe the allergy, it's pretty simple. You want to remove whatever is irritating your hamster. Change the food if it's a food allergy, or change the bedding if it's an allergy to the bedding.

If the symptoms do not go away within a few days, you may want to try removing something else. Don't change too many things at the same time, though, because you won't know for sure what the allergy was for and what you want to avoid.

If you just can figure out what the allergy is and the symptoms keep persisting, you may need to seek veterinary assistance, as the symptoms may be caused by an infection instead of an allergy.


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.