Contains all 12 essential vitamins for a balanced diet in birds along with increased levels of vitamin D3 to support birds with insufficient access to natural sunlight. Vitamin D3 is a particularly important nutrient. Birds housed indoors may lack D3, which can lead to poor breeding success and chick growth, inadequate calcium absorption and many other problems.Recommended For; All birds on seed diets, particularly useful for birds housed indoors with limited or no access to natural sunlight.