Pet dander is composed of tiny, even microscopic, flecks of skin shed by cats, dogs, rodents, birds and other animals with fur or feathers. These bits of skin can cause reactions in people who are specifically allergic to these triggers.

Is everyone allergic to pet dander?

Allergies to pets with fur are common, especially among people who have other allergies or asthma. In the United States, as many as three in 10 people with allergies have allergic reactions to cats and dogs. Cat allergies are about twice as common as dog allergies.

How bad is pet dander?

How Does Pet Dander Affect Respiratory Health? Airborne particles get into the lungs and can cause breathing problems just like any particulate matter. Particulate matter inside your lungs can trigger coughing, wheezing, and shortness of breath. The worst case scenario is that it can trigger an asthma attack.