The UltraCruz Poultry Bone and Egg Builder Supplement for Chickens is a supplement for chickens designed to supply Calcium, Vitamins A, D and E and other necessary elements to help ensure strong egg shells and bones and to prevent calcium deficiency. This potent formula contains fat soluble essential vitamins and minerals that provide chickens with bone and egg support. Stressed hens and egg-laying hens can benefit from the addition of this high quality vitamin and mineral supplement in their diet. This palatable pellet may be especially beneficial for chickens living in Calcium deficient regions or those with a diet low in calcium. The supplement comes in a 10 lb. package size.