Iams ProActive Hairball Formula Is For The Adult Cat With Hairball Problems. Complete nutrition for healthy skin and digestion. Promotes colon health and reduces waste and litter box odor. Chicken and Chicken By-Product Meal Based. 409 kcal/cup. Crude Protein not less than 32%, Crude Fat not less than 21%, Crude Fiber not more than 6.5%, Moisture not more than 10%, Ash not more than 7%. 4 Lbs.