Healthy membranes in a fertilised egg are essential if the embryo is to develop into a healthy chick. For membrane development breeding birds need access to essential fatty acids. Breeding Aid contains essential fatty acids for membrane development, egg laying, chick growth and immunity, and Vitamin A for cell development, Vitamin D3 for calcium absorption, bone growth and egg formation and Vitamin E, an antioxidant that helps maintain cell membranes. Breeding Aid is a must for all breeding birds fed on a seed diet and is particularly useful for smaller birds that produce a large numbers of eggs or multiple clutches. Additional vitamin, mineral and calcium supplements are still advised for birds on seed diets.