Bill Oddie's Nutri-boost is a high energy food to give birds a boost all year round. For all birds and especially blackbirds and tree sparrows Bill Oddie's Nutri-boost is a great energy source packed with nutritious ingredients like sunflower hearts black sunflower and peanut granules. Bill Oddie's Nutri-boost gives hungry birds all the goodness they need to keep going during the winter months and in helping them prepare for the breeding season.