Second Location: Beginning in August 2026, we will see patients on Tuesdays at our new location: 8888 Ladue Road, Suite 105, St. Louis. Our primary location at 4800 Mexico Rd in St. Peters will be closed on Tuesdays. We look forward to welcoming you to our new space!
Dog Allergy Causes, Symptoms, Testing & Treatment
A dog allergy is one of the most common household allergies. While many people assume the problem comes from dog hair, the real trigger is a set of proteins found on a dog’s skin, saliva, and urine. This guide explains what dog allergies are, why they happen, how to recognize symptoms, how testing works, and what treatment and management options are available.
When you’re ready to see an allergist, Dr. Sonia Cajigal is a board-certified pet allergy doctor in St. Peters, Missouri that’s accepting new patients throughout the St. Louis area. Schedule your first visit at St. Louis Family Allergy today!
“This office was AMAZING! I am so very impressed. I have never had more of a thorough doctor. The office staff was great too. I brought a newborn in and they all treated the situation of me having my baby there great. She made sure to lay everything out on the table of what could be the cause of my symptoms. She was so helpful.”
– Rachel M, February 2022
About Dog Allergies
Dog allergens are difficult to avoid because they:
- Remain suspended in the air for long periods
- Stick to furniture, carpets, clothing, and walls
- Can persist for months even after a dog is removed
This explains why dog allergy symptoms may occur in dog-free rooms or when visiting homes where dogs once lived.
What Dogs Are Hypoallergenic?
Many people search for “hypoallergenic dogs,” but no dog breed is truly hypoallergenic. While some dogs shed less hair, all dogs produce allergenic proteins. Symptoms vary based on individual sensitivity, allergen levels, and environment; not breed alone. However, common breeds recommended for people with dog allergies include Poodles, Bichon Frises, Miniature Schnauzers, Portuguese Water Dogs, and Lagotto Romagnolos.
Dog Allergy vs. Dog Sensitivity
- Irritants such as dust or pollen carried on fur
- Strong odors
- Shampoos, grooming products, or cleaning chemicals
A true dog allergy involves an immune response and can be confirmed through allergy testing. Proper diagnosis ensures you receive the most effective treatment.
See a Pet Allergist
in St. Louis, Missouri
Dog Allergy Symptoms
Dog allergy symptoms may appear shortly after exposure or develop gradually with repeated contact. Dog allergy symptoms can range from mild to severe, including:
- Sneezing
- Runny or stuffy nose
- Itchy nose or throat
- Coughing or wheezing
- Shortness of breath or chest tightness
- Itchy, red, or watery eyes
- Skin itching or redness after contact
- Hives or rash where allergens touch the skin
People with asthma may also notice worsened asthma symptoms when exposed to dogs.
Because allergens linger in the environment, symptoms may persist even after exposure ends.
Why Do Some Dogs Trigger More Symptoms Than Others?
- Dogs produce different amounts of allergenic proteins
- Grooming frequency affects allergen spread
- Home ventilation and cleaning habits matter
This variability does not mean the allergy is imagined — it reflects differences in allergen exposure.
Dog Allergy Testing and Diagnosis
If you suspect you are allergic to dogs, an allergist can confirm the diagnosis through:
- Symptom and exposure review, including timing and triggers
- Skin prick testing, the most common and reliable method
- Blood testing when skin testing is not appropriate
A positive dog allergy test confirms immune sensitivity but does not predict how severe symptoms will be or require giving up a pet. Test results help guide treatment decisions.
in St. Louis, Missouri
Dog Allergy Treatment Options
The most effective dog allergy treatment is avoiding dogs, but this is not always practical or desired. Many people successfully live with or around dogs using a combination of medical treatment and environmental strategies.
Environmental Control
- Keep dogs out of bedrooms
- Use HEPA air purifiers
- Vacuum with high-efficiency filters
- Wash hands and change clothes after contact
- Have non-allergic household members groom dogs
Environmental steps are helpful but usually not sufficient alone.
Allergy to Dogs Medications
Medications for dog allergies may include:
- Antihistamines for sneezing and itching
- Nasal sprays for congestion and inflammation
- Eye drops for allergic eye symptoms
Dr. Cajigal can recommend safe and effective options based on your symptoms.
Allergy Immunotherapy (Allergy Shots) for Dogs
Benefits may include:
- Long-term symptom improvement
- Reduced medication use
- Better asthma control
Immunotherapy is a long-term approach and works gradually, but it can be especially helpful for patients who want to live with dogs.
Living With a Dog Allergy
When to See an Allergist for Dog Allergies
- Dog allergy symptoms persist despite medications
- You experience asthma symptoms around dogs
- Symptoms interfere with sleep, work, or daily activities
- You want long-term relief rather than temporary symptom control
Dr. Cajigal can help confirm your diagnosis and create a personalized treatment plan.
References
[2] Asthma and Allergy Foundation of America: https://www.aafa.org/
Asthma
Drug Allergies
Eye Allergies
Food Allergies
Nasal Allergies
Skin Allergies
Allergy Shots
Allergy Testing
Biologic Therapy
Pet Allergist
Dr. Sonia Cajigal
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We are currently accepting new adult and pediatric patients at St. Louis Family Allergy!
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