Eagle Pack Hairball Relief Formula Is Made For Adult Cats Troubled With Hairballs. Chicken Meal Based Formula contains selected fibers to move hairballs to the litter box. 6 times more effective than the leading hairball control formula. 356 Kcal/cup. Crude Protein not less than 30%, Crude Fat not less than 14%, Crude Fiber not more than 7%, Moisture not more than 10%, Ash not more than 5.5%. 6 Lb.