Hartz?? Hairball Treat Plus??? Chicken Flavored Soft Chews. This are the real chicken flavored chews for cats + kittens. Our soft chews not only help hairballs pass through the gastrointestinal tract but also help prevent the formation of hairballs through regular use. The infusion of omega 3-6-9 fatty acids in our soft chews supports a cat s healthy skin and coat which also provides additional hairball control during routine grooming.