Peckish Winter Warmer Extra Energy Seed Mix is a unique blend of 9 different ingredients which are high in energy and fat, helping to refuel garden birds during the winter months when natural food resources are low. Including oil seeds and cereals, this mix is enriched with Calvita, a unique blend of vitamins and nutrients, providing everything that a bird needs to fuel them for longer. Carotenoids help develop feather colour and protects against sunlight damage; Calcium promotes strong bone and feather growth and is essential for egg production; and Vitamins A, D, E and Biotin strengthen beaks and bones while helping growth and reproduction.