Allergies to animals

Animal Allergy: It's Not About the Fur

The common belief is that pet fur causes allergies. In fact, this is a myth. Fur itself is rarely an allergen. The true cause of allergic reactions is proteins found in an animal's saliva, urine, and dander (dead skin flakes). These microscopic allergens dry easily, become airborne, settle on furniture, carpets, and clothing, leading to year‑round symptoms.

What Is the Real Allergen?

Each animal has its own specific protein allergens. For example, the main cat allergen is the protein Fel d 1, which is produced in the salivary and sebaceous glands. When a cat grooms itself, it spreads this protein over its fur, which then acts as a “carrier” for the allergen. Animal allergens are very light and “airborne”; they can remain in a room for many months even after the animal has left.

"Hypoallergenic" Breeds: Myth or Reality?

The idea of “hypoallergenic” cat or dog breeds is largely a marketing ploy. There are no breeds that do not cause allergies at all. All of them produce allergenic proteins. Some breeds that shed less (e.g., poodles) may disperse fewer allergens around the home, which can ease symptoms for some people but does not eliminate the problem entirely. The amount of allergen production can depend more on the individual animal than on the breed.

Symptoms of Animal Allergy

Animal allergy most commonly presents with respiratory symptoms: runny nose, sneezing, nasal congestion, cough, wheezing, and asthma exacerbations. It also commonly causes allergic conjunctivitis (itchy, red eyes) and skin reactions such as hives upon direct contact with animal saliva.