Pet Allergies: Symptoms, Causes & Treatment in Canada

Pet allergies are far more common among Canadians than most people realize, affecting an estimated one in five adults across the country. They occur when your immune system overreacts to harmless proteins found in an animal’s skin cells, saliva, or urine, triggering uncomfortable and sometimes serious symptoms. Whether you already own a pet or are considering bringing one home, understanding how pet allergies work is the first step toward finding lasting relief.

How Are Pet Allergies Diagnosed in Canada?

Pet allergy symptoms can range from mild — such as a runny nose, sneezing, and itchy eyes — to more severe reactions like hives, chest tightness, and worsening asthma. The good news is that Canadians have access to effective cat and dog allergy treatments, from over-the-counter antihistamines and nasal sprays to long-term allergy shots (immunotherapy) available through your family doctor or allergist.

What Are Pet Allergies?

Common Pet Allergy Symptoms: Signs, Descriptions, and Severity Levels

Symptom	Description	Severity	When to Seek Care
Sneezing and Runny Nose	Frequent sneezing episodes and clear nasal discharge triggered by exposure to pet dander, saliva, or urine proteins	Mild to Moderate	See your family doctor if symptoms persist beyond two weeks or disrupt daily life
Itchy, Watery Eyes	Redness, itching, and excessive tearing of the eyes (allergic conjunctivitis) following contact with pets or pet-inhabited spaces	Mild to Moderate	Consult a doctor if vision is affected or symptoms do not respond to antihistamines
Skin Reactions (Hives or Eczema)	Raised, itchy welts or red patches on the skin after direct contact with a pet; may worsen in individuals with existing eczema	Moderate	Seek medical attention if rash spreads rapidly or is accompanied by swelling
Asthma Symptoms	Wheezing, chest tightness, shortness of breath, and coughing caused by airborne pet allergens irritating the airways	Moderate to Severe	Contact your doctor promptly; call 911 if breathing becomes severely compromised
Nasal Congestion	Blocked nasal passages due to inflammation of the nasal lining, often causing difficulty sleeping and reduced sense of smell	Mild to Moderate	See a healthcare provider if congestion is chronic or leads to recurring sinus infections
Anaphylaxis (Rare)	A severe, life-threatening allergic reaction involving throat swelling, a sudden drop in blood pressure, and difficulty breathing; extremely rare with pet allergies	Severe	Call 911 immediately and use an epinephrine auto-injector (e.g., EpiPen) if prescribed

Pet allergies occur when your immune system treats harmless animal proteins as a threat. These proteins — called allergens — are found in a pet’s fur, skin (dander), saliva, and urine. Your immune system reacts as if these proteins were dangerous invaders, like bacteria or viruses.

This overreaction causes the familiar symptoms of an allergic response. Even short exposure to a pet can trigger a reaction in some people. In addition, allergens can linger in a home long after a pet has been removed.

Which Pets Cause the Most Allergies?

Any animal with fur or feathers can trigger pet allergies. However, cats and dogs are the most common sources of pet allergens in Canadian homes. Other animals that can cause allergic reactions include:

• Rabbits
• Rodents (rats, mice, hamsters, gerbils, and guinea pigs)
• Birds
• Horses

It is a common myth that certain breeds are “hypoallergenic.” In reality, all warm-blooded animals produce some level of allergens. According to the Mayo Clinic, no dog or cat breed is completely free of allergens.

Common Symptoms of Pet Allergies

Pet allergy symptoms often feel similar to hay fever or a common cold. This can make them tricky to identify at first. However, a key sign is that your symptoms appear or worsen when you are around animals.

Common symptoms of pet allergies include:

• Sneezing
• Runny or stuffy nose
• Itchy, red, or watery eyes
• Itchy skin or hives (raised, red welts on the skin)
• Scratchy throat or mouth
• Coughing
• Shortness of breath
• Worsening asthma symptoms

Pet allergies share many symptoms with the flu and the common cold. If you are unsure whether your symptoms are caused by an allergy or an illness, speak with your family doctor or visit a walk-in clinic. They can help you figure out the cause.

How Long Do Pet Allergy Symptoms Last?

Once you move away from the allergen source, symptoms usually clear up within a few hours. However, if your pet allergies are severe, symptoms can linger for several days. Showering and washing your clothes after exposure can help speed up your recovery.

Over-the-counter antihistamines typically start working within 30 minutes. Nasal antihistamines can begin to relieve symptoms in as little as 15 to 30 minutes. Nasal corticosteroid sprays, on the other hand, may take at least two weeks of regular use before you notice full relief.

How Are Pet Allergies Diagnosed?

If you notice allergy symptoms around animals, it is a good idea to see a doctor. In Canada, your family doctor can refer you to an allergist — a specialist in allergic conditions. Most provincial health plans cover allergy assessments and testing through a referral.

An allergist can confirm a pet allergy using one or both of these tests:

Skin Prick Test

This is the most common allergy test. The allergist places small drops of different pet allergens on your forearm or upper back. They then use a tiny lancet (a thin needle) to lightly scratch the skin so the drops can enter. You will feel only minor discomfort and will not bleed.

If you are allergic, a small raised bump — similar to an insect bite — will appear at the test site within 15 minutes. The allergist measures the size of the reaction and records which allergens caused it. The whole test takes less than one hour.

Blood Test (IgE Test)

A blood test measures the level of allergy-related antibodies (called IgE) in your blood. Your doctor sends a blood sample to a lab, and results can take a week or more to come back. This test is often used when a skin prick test is not suitable — for example, if you have a skin condition.

Treatment Options for Pet Allergies

You cannot permanently cure pet allergies, but you can manage them effectively. Health Canada recognizes several safe and effective treatment options for allergic conditions. Your doctor can help you choose the right approach based on your symptoms.

Medications

Several over-the-counter and prescription medications can help control pet allergy symptoms:

• Antihistamines: These reduce sneezing, itching, and runny nose. They are available at most Canadian pharmacies without a prescription.
• Nasal corticosteroid sprays: These reduce inflammation in the nasal passages. They work best when used consistently every day.
• Nasal antihistamines: These sprays work quickly and target nasal symptoms directly.
• Decongestants: These help relieve a stuffy nose but are not meant for long-term daily use.

If you are frequently around animals, your doctor may recommend taking antihistamines every day to keep symptoms under control. Always follow your doctor or pharmacist’s guidance on dosage.

Allergy Shots (Immunotherapy)

For long-term relief, some Canadians turn to allergy shots — also called immunotherapy. Each injection contains a small amount of the allergen. Over time, your body becomes less sensitive to it. As a result, your symptoms become milder or may disappear altogether.

Some people continue to experience relief even after they stop receiving injections. Talk to your allergist to find out if immunotherapy is right for you. This treatment is available through specialist referral under most provincial health plans.

How to Prevent Pet Allergy Symptoms

The most effective way to prevent pet allergies is to avoid the animals that trigger your reactions. However, for many Canadians — especially those who already own pets — this is not always practical. Furthermore, pet allergens can stay in furniture, carpets, and clothing for months.

If avoiding pets is not an option, these steps can help reduce your exposure to allergens:

• Keep pets out of your bedroom. Your sleeping area should be an allergen-free zone.
• Avoid close contact with pets. Try to limit petting, hugging, and allowing animals to rub against you.
• Bathe and brush pets regularly. Do this outdoors when possible. Use a pet shampoo designed to reduce dander.
• Vacuum often. Vacuum carpets and upholstered furniture at least twice a week. Use a vacuum with a HEPA or micro-filter bag to trap fine allergen particles.
• Consider removing carpets. Carpets trap pet allergens deep in their fibres. Hard flooring is easier to keep allergen-free.
• Use an air purifier. A HEPA air purifier in your main living areas can help capture airborne allergens.
• Wash your hands after touching pets. Avoid touching your face before washing your hands.

These strategies do not eliminate allergens completely. However, they can significantly reduce the amount of allergen in your home and lower the severity of your symptoms. Healthline offers additional tips on reducing pet allergens at home.

When to See a Doctor About Pet Allergies

You should speak with a healthcare provider if your symptoms are interfering with your daily life or sleep. In Canada, you have several easy options. Start with your family doctor, who can assess your symptoms and refer you to an allergist if needed. If you do not have a family doctor, a walk-in clinic can help with initial assessment and guidance.

Seek urgent medical attention if you experience severe shortness of breath, chest tightness, or a sudden worsening of asthma symptoms. These can be signs of a serious allergic reaction that needs immediate care. Always consult a doctor before starting or changing any allergy treatment plan.

Frequently Asked Questions About Pet Allergies

Key Takeaways

• Pet allergies happen when your immune system overreacts to proteins in an animal’s dander, saliva, or urine.
• Cats and dogs are the most common triggers, but rabbits, rodents, birds, and horses can also cause reactions.
• Symptoms include sneezing, itchy eyes, hives, and worsening asthma. They can be confused with a cold or flu.
• An allergist can diagnose pet allergies using a skin prick test or a blood (IgE) test.
• Treatment options include antihistamines, nasal corticosteroids, and long-term allergy shots (immunotherapy).
• Reducing allergens at home — by vacuuming often, bathing pets, and using HEPA air purifiers — can help lower symptom severity.
• Always speak with your family doctor, allergist, or a walk-in clinic provider before starting any new treatment for pet allergies.