Can Dogs Be Allergic to Cats?

You probably know that humans can be allergic to cats. But if your dog is experiencing allergy symptoms for no clear reason, your feline friend may well be the culprit.

We break down the science and signs of dog allergies to help you figure out how to support your pup.

Key Takeaways

Dogs can be allergic to all kinds of things, including cats.
Allergic reactions happen when the immune response overreacts to certain substances, called allergens.
Cat allergens can be spread through saliva, hair, and dander.
Common signs of allergies in dogs include itchy skin, sneezing, and watery eyes.
It's important to consult with your vet to confirm whether your dog is allergic to cats or something else.
Functional mushrooms may help your dog maintain normal histamine levels.

See More: 6 Ways to Soothe & Calm Down Your Cat

Dog and Cat Allergies

Sean Zyer, founder of Earth Buddy, says:

"Dogs can be allergic to cats. You can support your dog by taking them to the vet, reducing their exposure to cat allergens, and giving them supplements to help them maintain normal histamine levels."

Few things are more adorable than a dog and cat who are best friends. But sometimes things can get in the way of this magical pairing.

One of those potential problems is allergies.

Dogs, just like humans, can develop allergies to all kinds of things.¹ Seasonal or environmental allergies are common examples. Another is allergies to other animals, like cats.

So, if you're wondering whether dogs can be allergic to cats, the short answer is yes. And cats can be allergic to dogs, too.

Fortunately, there are a few ways you can support your pup. We'll break down some of them below.

Before you do that, you need to determine whether your dog is actually allergic to cats. To help you with that, we'll break down the science and symptoms behind your furry friend's potential allergies.

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Understanding Your Dog's Allergies

Allergic reactions happen when your dog's immune system overreacts to something that is, in reality, harmless. The immune system treats this thing as a threat, triggering an allergic reaction.²

With seasonal allergies, that thing might be pollen. Some dogs react to things like dust mites. And others react to substances from cats.

These substances can vary. They include cat hair, saliva, or dander, the tiny flakes of dead skin cats shed. All of this can carry certain proteins, which may trigger an allergic reaction in dogs (and humans).

One cat allergen is a protein called Fel d 1.³ It's the primary allergen responsible for cat allergies in humans, though scientists aren’t entirely sure if it also affects dogs.⁴

Common Allergy Symptoms

As you probably know, pet parents develop incredibly close relationships with their furry friends. That makes us well placed to notice if something is off.

Allergies can manifest in dogs in various ways.⁵

One of the most common signs is itchy skin. If your dog is scratching excessively, they might be experiencing allergy symptoms. Redness of the skin is another sign.⁶

Itchy, red, and watery eyes are another potential symptom of cat allergies.⁷ Other potential symptoms include respiratory issues, like sneezing or coughing.⁸ Your dog may also experience issues with their ears.⁹

Now, these signs aren't necessarily specific to cat allergies. So you'll need to try to ascertain when and where they emerge. Is there a pattern linked to, say, your dog interacting with your cat, or spending time in shared spaces where cat allergens linger?

Bonus: Why Is My Dog Panting So Much?

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Allergy Testing

Unfortunately, distinguishing different allergies can be quite difficult. For one thing, cat allergens can linger in homes for several months.¹⁰ And, as we mentioned, your dog might be allergic to various things.

If you aren't sure, it's important to check with your vet. They can help you get to the bottom of what might be causing your dog's symptoms.

Your vet will usually start by asking for your dog's history. So it's important to try to keep track of the signs. They then might perform skin allergy testing to figure out if your dog really is allergic to cats. One example is a skin prick test, which can identify your dog's allergens.¹¹

What You Can Do to Support Your Dog

Once you've determined your dog really is allergic to your cat, it's important to support them. If left alone, your dog's allergies can lead to serious complications, especially surrounding their skin.

Your vet may have various ways to help you support your dog, so it's important to consult with them. But there are some relatively simple things you can do at home to support your pup, too.

Reduce Exposure

One of the most important ways to support your dog is to try to limit their allergen exposure. One way to limit exposure is by regularly cleaning.

That applies to both your house and your dog. Bathing your dog and wiping their paws regularly can also help reduce allergen exposure.¹²

Air purifiers, ideally with HEPA filters, may also help clear the air of airborne allergens.

Supportive Supplements

As we mentioned, allergic reactions happen when the immune system overreacts to an allergen. One of the components of that overreaction is releasing histamines. These are chemical messengers that cause many common allergy symptoms, like itchy skin.

Therefore, it's important to try to help your dog maintain normal histamine levels.

Research suggests that functional mushrooms may help do exactly that. For example, one study found that an extract made from reishi mushrooms helped maintain normal histamine levels.¹³ And a 2025 review of studies involving Lion's Mane mushroom concluded that it can help the body maintain a normal inflammatory response.¹⁴

Earth Buddy's Allergy & Immune Support Mushroom Tincture is a specialized blend of both of these mushrooms, plus three other potent functional mushrooms. Together, these functional mushrooms can help support normal histamine function.

Earth Buddy sources its mushrooms from USDA organic facilities and tests them with third-party laboratories to ensure their potency. We also carry other types of supplements for both dogs and cats, including CBDA Tinctures and Bovine Colostrum Powder.

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Conclusion

Dogs can be allergic to cats. Common signs include itchy skin, watery eyes, and sneezing. However, those can be signs of allergies in general, so it's often a good idea to check with your vet.

Frequently Asked Questions

How Do You Tell If a Dog Is Allergic to a Cat?

Common signs of allergies in dogs include intense itching, scratching, sneezing, and watery or red eyes. Try to see if these signs happen after contact with cat allergens. Your vet can help you confirm if your dog is actually allergic to cats.

What Can I Give My Dog If He's Allergic to Cats?

Your vet can help you figure out how best to support your allergic dog. Functional mushroom supplements can help your dog maintain normal histamine levels.

What Dog Breeds Are Allergic to Cats?

Any dog breed can theoretically be allergic to cats. However, certain breeds, such as Westies, bulldogs, retrievers, German shepherds, and flat-faced breeds, are generally more likely to experience allergies.

Keep Reading: What to Feed a Cat With an Upset Stomach

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Earth Buddy is an environmentally conscious and family-owned company dedicated to providing natural solutions for pets. From our CBD oils to our colostrum supplements, our products are designed to promote calmness and encourage relaxation for our furry friends. To learn more and stay connected, follow us on Facebook, Instagram, LinkedIn, YouTube, and Pinterest.

Can Dogs Be Allergic to Cats?

Key Takeaways

Dog and Cat Allergies