Home pet birds often lack vitamins and minerals. For example, the organism of birds produces vitamin D3 only in the ultraviolet light.Due to the lack of sunlight home pet birds can not synthesize sufficient amounts of vitamin D3. RIO additional feed complex is a combination of essential vitamins, micro- and macro elements required for ultimate nutrition and health of the birds. When used on a daily basis, the complex eliminates the symptoms and adverse effects of the unbalanced diet. It also restores bird’s plumage and skin, keeps it in good condition and reduces excessive moulting.