Extruded pellet - Maintenance food for hornbills Scientifically approved composition with all the nutrients your birds need. Completely consumable, prevents selective eating behaviour. With fruit. Iron Storage Disease is a frequently occurring problem with frugivorous and insectivorous birds; that is why NutriBird H16 has such a very low iron content (max 85 ppm). Recommended by veterinarians and used worldwide by ornithological parks and top breeders.