POLLEN: Pollen is what triggers Romeo’s allergies. An allergic reaction to pollen can cause swelling and itching. A dog’s ...

scratching and biting all the time? They could have a flea allergy. "Dogs with a flea allergy may scratch excessively, even when relatively few or no fleas are visible," explains Dr. Godfrey.

Excessive itching may signal an underlying issue. Learn about common dog allergies, symptoms, and treatment options for ...