Caged birds on seed diets require nutritional supplementation with vitamins and minerals to maintain good health.Soluvite D Breeder is an easy to administer, water soluble formula that provides additional Vitamin D3, as well as other essential vitamins. Soluvite D Breeder is 10 times stronger than Soluvite D, suitable for breeders, large aviaries, zoos, wildlife rescues and veterinarians.