The flakes from the skin, hair or feathers of all warm-blooded animals including dogs, cats, birds, and rodents.

also known as pet dander - shed pet skin.

The flakes of skin, hair, feathers, of all warm-blooded animals, including dogs, cats, birds, and rodents (mice, hamsters and gerbils). The length of animal hair does not matter. There is no such thing as a non-allergic dog or cat.