Allergies in Dogs: What to Watch For (and How to Help)

Written By Gracie Boliek

If your dog seems to be itching more than usual or has developed new skin or health issues, allergies may be the cause.

Just like in humans, allergies in dogs happen when the immune system overreacts to something in their environment. The three most common types are:

  • Flea allergies

  • Environmental allergies (like pollen, mold, and dust)

  • Food allergies (much less common than many people think)

The good news? Our veterinarians can help identify the cause and create a plan to keep your dog comfortable.

Signs of Dog Allergies

If your dog has allergies or an intolerance, you might notice:

  • Intense itching and scratching

  • Red, irritated skin

  • Chronic ear infections

  • Excessive licking

  • Vomiting or diarrhea

  • Gas or weight loss

  • Bacterial, fungal, or yeast infections

Are Some Dogs More Prone?

Allergies typically show up between ages 1–3, but they can develop at any time.

Breeds more commonly affected include:
Chinese Shar-Pei, Golden Retriever, Labrador Retriever, Boxer, Shih Tzu, and several terriers. But any dog, including mixed breeds, can develop allergies.

Common Types of Dog Allergies

Flea Allergies

Fleas are the #1 cause of skin allergies in dogs. Even a single bite can trigger a major reaction.

You may notice itching around:

  • The collar area

  • Base of the tail

Monthly flea prevention is essential, even if you don’t see fleas.

Environmental Allergies

Also called atopy, these are caused by things like pollen, dust, and mold.

Common signs:

  • Paw licking

  • Ear scratching

  • Face rubbing

  • Seasonal flare-ups

Food Allergies

Despite popular belief, food allergies are rare (only about 4–10% of cases).

They’re usually linked to proteins like beef or chicken, not grains, and can develop even after years on the same diet.

Diagnosing Allergies

Some causes, like fleas, are easier to identify. Others may require:

  • Skin testing

  • Blood testing (mainly for environmental allergies)

Food allergies are typically diagnosed through elimination diets rather than testing.

Treatment Options: Finding Relief for Your Dog

If our veterinarians identify the likely cause is environmental, the next step is managing symptoms and helping your dog feel better quickly.

Two of the most common and effective options for environmental allergy-related itching are:

Apoquel

  • Daily oral medication

  • Works quickly to stop itching at the source

  • Great for year-round allergies or flexible dosing at home

  • Best for dogs who tolerate pills well

Cytopoint

  • Monthly injection given by a veterinarian

  • Targets itch signals in the immune system

  • Ideal for seasonal allergies or dogs who don’t take pills easily

  • Long-lasting relief with minimal side effects

So which is right for your dog?
It depends on their lifestyle, allergy type, and what works best for you as a pet owner. Our veterinarians can help guide that decision.

The Bottom Line

Allergies can be frustrating for both you and your dog, but they are very manageable with the right approach. Whether it’s prevention, environmental changes, or medical support like Apoquel or Cytopoint, relief is possible.

If you’re noticing signs of allergies, don’t wait! Getting ahead of symptoms early can make a big difference in your dog’s comfort and overall health. Call us at (540) 344-8707 or email angels@angelsofassisi.org to make a clinic appointment today!


Information via Purina

Gracie Boliek
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