Household pets are the most common source of allergic reactions to humans. Many people think that pet allergies are provoked by the fur of cats and dogs, but researchers have found that the major allergens are proteins secreted by oil glands in the animal's skin and constantly shed in dander, as well as proteins in the saliva, which sticks to the fur when the animal licks itself. Dander Free for Cats provides natural control for dander on cats known to cause human allergies.