Nutrena NatureWise Nourish Waterfowl 18% Floating Bits 30#NatureWise Nourishing Waterfowl 18% Protein Floating Bits are specially cooked for better nutrient absorption and less waste, making every bit better for birds. Their unique floating design is ideal for on the water feeding. Crafted to support bird health this complete balanced diet includes a guaranteed minimum amount of niacin to support the specific needs of ducks and prebiotics and probiotics to promote optimum digestion and nutrient absorption.