Iams ProActive Health Weight Control Formula Is The Healthy Way For Your Cat To Loose Weight And Not Loose Energy. Made with 10% less fat than original formula and still loaded with vitamins and minerals. Chicken By-Product Meal and Corn Grits based. 319.2 kcal/cup. Crude Protein not less than 28%, Crude Fat not less than 11%, Crude Fiber not more than 3%, Moisture not more than 10%, Ash not more than 7%. 4 Lbs.