Pet allergies What square measure pet allergies? Allergic to puppy dander
People with pet allergies have over-sensitive immune systems. They can react to harmless proteins in the pet's urine, saliva or dander (dead skin cells). The. According to allergist Dr. Tania Elliott, a spokesperson for the ACAAI, people can develop allergic reactions to pet dander (similar to dandruff in humans). Unfortunately, pet dander triggers allergic reactions in many people. The allergic reaction is to the proteins found in pets' skin cells. Pet allergies / What are pet allergies?