Science Diet Light Hairball Formula Is For Adult Cats That Are In Danger Of Weight Gain And Troubled By Hairballs. Not for kittens, pregnant or nursing cats. Contains antioxidants, vitamins and minerals. High fiber to move hairballs and reduced calorie to avoid weight gain. 283 kcal/cup. Chicken By-Product Meal Based. Crude Protein not less than 36%, Crude Fat not less than 9.1%, Crude Fiber not more than 8.3%.