Feline Furball Plus is a breakthrough formula to support skin tone, elasticity and hair health. Hairball focuses on factors in cats such as healthy skin, G.I. tract and urinary tract health issues. Our formula includes Psyllium, a soluble fiber that supports G.I. tract health and function, and Papain, an enzyme from papaya that helps break down the mucus that holds the hairball together. It actually helps to break up the matrix of the hairball.