Understanding Pet Allergies: Symptoms, Causes, and Treatments

November 12, 2025

Identify and Find Relief for Your Pet's Allergies

Welcoming a pet into your home brings immense joy, companionship, and unconditional love. As a responsible pet owner, you do everything you can to keep them healthy and happy. But what happens when you notice your furry friend is constantly scratching, sneezing, or seems uncomfortable? It could be a sign of pet allergies. Understanding the signs, triggers, and solutions is the first step toward providing them with much-needed relief.


Unfortunately, pets can't tell us when they feel unwell, so it's up to us to watch for clues. Allergic reactions in pets often manifest on their skin or through their respiratory system. While symptoms can vary depending on the allergen and the individual animal, there are several common signs to look out for.

Symptoms: How to Spot an Allergic Reaction

Persistent Itching and Scratching

One of the most frequent indicators of an allergy is intense itchiness, medically known as pruritus. You might notice your pet scratching, biting, or licking a specific area of their body relentlessly. This can lead to hair loss, "hot spots" (acute moist dermatitis), and open sores, which are susceptible to secondary bacterial or yeast infections. Common target areas include the paws, ears, belly, and the base of the tail.



Skin Irritations and Changes

Allergies can cause visible changes to your pet’s skin. Look for:

  • Redness and inflammation
  • Rashes or hives
  • Dry, flaky skin resembling dandruff
  • A greasy coat or an unusual odor from the skin


Chronic ear infections are also a classic sign, especially in dogs. If you find yourself cleaning out waxy, smelly ears frequently, an underlying allergy could be the culprit.


Respiratory and Digestive Issues

While skin problems are most common, some allergies cause respiratory or digestive symptoms. These can include:

  • Sneezing, coughing, or wheezing (similar to human hay fever)
  • Watery, red, or itchy eyes
  • Vomiting or diarrhea, which are often linked to food allergies


Noticing any of these signs is a clear signal that it's time to investigate the cause.

Causes: What's Making Your Pet Miserable?

Environmental Allergens

This is the most common category of allergens affecting pets. Just like humans, pets can be allergic to substances they inhale or come into contact with. These include:

  • Pollen: From trees, grasses, and weeds, often causing seasonal flare-ups.
  • Mold Spores: Found in damp areas like basements or bathrooms.
  • Dust Mites: Microscopic creatures that live in carpets, bedding, and furniture.
  • Dander: Surprisingly, pets can be allergic to dander from other animals or even humans.


Food Allergies

True food allergies are less common than environmental allergies but can cause significant discomfort. They occur when a pet's immune system mistakenly identifies a protein in their food as a threat. The most frequent culprits include proteins from:

  • Beef
  • Dairy
  • Chicken
  • Wheat
  • Soy


Food allergies can cause both skin issues (itching, hives) and gastrointestinal problems (vomiting, diarrhea). It’s important to distinguish a food allergy from a food intolerance, which doesn't involve the immune system but can still cause digestive upset.

Treatments: Finding Relief for Your Pet

Medications and Medical Therapies

Your vet may prescribe medications to manage symptoms and reduce inflammation. These can include:

  • Antihistamines: While not always as effective in pets as in humans, they can provide relief for mild cases.
  • Corticosteroids: These are powerful anti-inflammatory drugs that offer fast relief from severe itching. However, they are typically used for short-term control due to potential side effects with long-term use.
  • Medicated Shampoos and Topicals: Bathing with a hypoallergenic or medicated shampoo can help soothe irritated skin and remove surface allergens.
  • Immunotherapy: For severe environmental allergies, your vet may recommend allergy testing (blood test or skin test) to identify specific allergens. Based on the results, a series of allergy shots or under-the-tongue drops can be formulated to help desensitize your pet's immune system over time.


Dietary Changes

If a food allergy is suspected, your veterinarian will likely recommend an elimination diet. This involves feeding your pet a special diet with a single, new protein and carbohydrate source for 8-12 weeks. If symptoms improve, ingredients from the old diet are slowly reintroduced one by one to pinpoint the exact allergen. Once identified, that ingredient can be permanently avoided.

Contact Our Veterinary Clinic Today to Schedule an Appointment!

Watching your beloved pet suffer from allergies can be heartbreaking, but you are not alone in this journey. With patience and a proactive approach, you can manage their symptoms and significantly improve their quality of life. The most important step is to work closely with your veterinarian. They can provide an accurate diagnosis, rule out other medical conditions, and create a tailored treatment plan that works for you and your pet.


For 20+ years, Briarcrest Veterinary Clinic has been a trusted partner for pet owners in Waller, Hempstead, Bryan, College Station, Brenham, Caldwell, Chappell Hill, Hearne, Madisonville, Navasota, TX, and the surrounding communities. Our knowledgeable and compassionate team is dedicated to providing the highest standard of veterinary care to ensure your pet lives a long, healthy, and happy life. Contact us today to schedule an appointment and find a solution to your pet's allergies!

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