ZuPreem Avian Fruit Blend Bird Diet for Large Birds 17.5lbZuPreem? AvianMaintenance FruitBlend Large Parrot ZuPreem? AvianMaintenance FruitBlend Flavor Diets are formulated to meet all the accepted nutrient requirements for the maintenance of various types of adult psittacines (hookbills) and passerines (softbills). The diets are nutritionally balanced and require no supplements. With controlled iron levels (less than 80 ppm), these diets may be beneficial for species predisposed to iron storage disease.