Home pet birds often lack vitamins and minerals. For example, the organism of birds produces vitamin D3 only in the ultraviolet light. Due to lack of sunlight home pet birds can not synthesize sufficient amounts of vitamin D3. RIO vitamin and mineral pellets include a special complex of essential vitamins, micro- and macro elements for ultimate nutrition and health of birds. When used on a daily basis, the complex eliminates the symptoms and adverse effects of an unbalanced diet. It hepls to support immune system, improve eye sight, skin condition and plumage.