Woodlot Companions Blog

Author: Kimberly Lee
Date: May 10, 2026

Can My Dog Have Allergies or a Sensitive Stomach?

After your pup sneezes, you may wonder whether your dog can have allergies. The answer is yes. However, unlike humans, dogs usually do not experience allergies through their respiratory systems. Instead, allergies in dogs most commonly cause itchy skin, ear infections, and upset stomachs. Dogs can develop three main types of allergies: environmental, flea-related, and food-related. Many different exposures can trigger these reactions, and identifying the exact cause can be difficult. Veterinarians often need to diagnose and treat these allergies.

Seasonal Allergies in Dogs

Environmental allergies are usually seasonal and can range from dust mites to, of all things, grass. These allergens can be inhaled or absorbed through the skin when your puppy touches them. If you notice red rashy skin on their underbelly or armpits, face rubbing on floors and furniture, or excessive scratching or itching, then you may be dealing with an environmentally triggered allergy.

To narrow down the possibilities of what may be causing your pup’s immune system to overreact, start with a deep clean. Bathe them, wash their bedding, and deep clean the areas of your house where they usually hang out. Additionally, you can apply an over-the-counter medicated care spray for any irritated skin.

Make note of any changes in their symptoms and track when flare-ups occur. There may be a pattern to when symptoms occur and the severity that may help you determine the cause of your puppy’s discomfort. If problems persist, make an appointment with your veterinary office. Your observations could help your vet diagnose the cause.

Fleas Cause Allergies?

Even without the threat of allergies, fleas are a nuisance. Unfortunately, your dog can also be allergic to their saliva, and it just takes one bite for their bodies to overreact. Where there is one flea, there are usually many more, and their bites can trigger severe itchiness that can lead to hair loss and crusty skin.

Even if you can not see any fleas, but your consantly waking up to the sounds of your furry friend scratching non-stop, look for flea excrement at the base of your dog’s fur. It has the look of coffee grounds. Flea Allergy Dermatitis is the most common skin disease in dogs and can lead to secondary infections that can complicate the health of your pup. Though the allergy itself is not considered a severe threat, it can discourage bonding with the family.

After confirming fleas as the cause of your pup’s discomfort, bathe them, wash their bedding, and do a deep clean of the house. You will also want to clean and spray the backyard. If your pup isn’t already taking a flea and tick medication, you’ll want to consult your veterinarian. Fleas carry much more than the threat of just an allergic reaction in their saliva!

Food-Related Allergies

Crazy enough, dogs can be born with food allergies or develop them over time from overexposure. Some breeds are more prone to particular food allergies than others. The most common allergens are proteins like chicken and beef. This is, of course, problematic considering these are the base ingredients of most dog foods and treats.

Symptoms to look for are those listed when your pup has environmental allergens paired with a change in their stool. Usually, their excrement is loose and of a very soft consistency. Severe ear infections can develop, too. If you suspect food to be the cause of their discomfort, make sure to still follow the guidelines for switching to a new food source. Changing their food too quickly can cause them major tummy troubles, too! Choose dog food that is made with a protein that your pup has not been exposed to yet. For example, our Bernese Mountain Dogs and Doodles often do better on a salmon-based diet. It’s easier on their tummies and brings out the shine in their coats!

If problems persist, your veterinarian can recommend hypoallergenic dog food or, for more severe allergies, a therapeutic veterinary diet. Your vet will also recommend an elimination diet trial to try to pinpoint the cause of your pup’s pain. If any of these prove necessary, no other foods or treats, especially any table scraps, should be given to your dog.

Though allergies of all kinds are never fun for anyone, they can be navigated with the help of your veterinarian. Giving your puppy the best care and their future families the tools to continue that care is a high priority for us here at Woodlot Companions. We hope this information has been educational and helpful in preparing you for pet parenthood!

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