Ferrets generally don't have inhalation allergies, and in animals that do, like dogs, the signs are itchiness of the skin of the face and feet, not watery eyes - I would look closely at the environment - is it dusty at all? Have you washed their bedding since wintertime? Always make sure in such cases that their environment is dust and dirt free. With kindest regards, Bruce Williams, DVM [Posted in FML issue 3776]