If you share your home with both cats and dogs, you may have wondered if dogs can develop allergies to their feline housemates. We know cats (and people!) can be allergic to dogs, but what about the other way around? Let's break down what science knows, how to recognize potential signs, and what you can do to keep everyone comfortable.

Can Dogs Really Be Allergic to Cats?

Yes, dogs can be allergic to cats, though it’s much less common than other allergies. Just as humans can be allergic to pet dander, some dogs’ immune systems may view proteins found in cat skin cells (dander), saliva, or urine as a threat. When dogs come into contact with these proteins, their bodies can react with allergy symptoms.

What Causes Allergies in Dogs?

Dog allergies happen when their immune system overreacts to something harmless in their environment. Common triggers include:

Pollen
Mold
Dust mites
Certain foods
Flea bites
Other animals, including cats

Cat dander is made up of microscopic skin flakes, which easily become airborne and settle in places your dog frequents. When inhaled or touched, these particles can trigger allergies in sensitive dogs.

Signs Your Dog May Be Allergic to Your Cat

Not every dog will react the same way, so it helps to pay attention to any changes, especially if you’ve recently introduced a cat into the house. Typical signs to watch for include:

Itchy, red skin: Excessive scratching, especially around the face, paws, or belly.
Sneezing or coughing: Just like humans, dogs can get sniffly and sneezy if they're allergic.
Watery eyes or runny nose: Look for more discharge than normal.
Chronic ear infections: Allergies can lead to recurring ear problems.
Licking their paws: Dogs often lick their paws to soothe itchiness.
Hives or rashes: Raised bumps, redness, or skin irritation.

If your dog is showing these symptoms, and there's a clear pattern of them worsening around your cat, it’s possible your dog has developed an allergy.

How Can You Confirm a Cat Allergy in Dogs?

A veterinarian is the best person to diagnose allergies. Here’s how they might proceed:

History and observation: Share all details about your pets’ interactions and when symptoms started.
Rule out other causes: Your vet will check for fleas, food allergies, and environmental triggers.
Allergy testing: Some vets will recommend skin or blood tests, though these aren’t always conclusive for all allergens.

What Can You Do If Your Dog Is Allergic to Your Cat?

There are ways to improve your dog’s comfort and keep both pets happy at home:

Regular cleaning: Vacuum carpets, wash bedding, and use HEPA filters to reduce airborne dander.
Bathe your cat: Regularly grooming your cat can help minimize the amount of dander shed.
Create separate spaces: Give your dog a dander-free zone in your home.
Medications: Antihistamines, allergy shots, or other prescription treatments may help; only use medications recommended by your vet.
Wipe your dog’s paws and fur: After interactions or when coming inside, wipe down your dog to remove any irritants picked up.

When to Talk to Your Vet

If your dog’s symptoms are persistent, worsening, or interfering with daily life, book a visit with your veterinarian. They can recommend the best approach to reduce discomfort and improve your dog’s quality of life.

The Bottom Line

While cat allergies in dogs aren’t as common as other types, they do happen. By knowing what to look for and working closely with your vet, you can find a strategy that keeps both your pup and kitty content. Pet-filled homes can be harmonious—even if a little sneezy now and then!