Complementary Food for Birds Oropharma Muta-Vit is a special blend of vitamins, amino acids and trace elements, with high content of sulfur amino acids and trace biotin. This dietary supplement promotes pen development and condition, enhances plumage, protects the liver and ensures optimal metabolism. Muta-Vit helps prevent frightful moult. During the molting, the bird is subject to stress. An ideal supplement for feeding is needed then. Muta-Vitro sulfur amino acids essential for the production of keratin, the building material for feathers and skin. Biotin ensures a good quality of keratin. This ensures a quick and smooth changeover.