As with all other animals, birds need a proper balance of carbohydrates, proteins, fat, vitamins, minerals, and water. Macaws are vulnerable to high cholesterol, atherosclerosis, stroke, vitamin A deficiency, insufficient dietary calcium, egg-binding, and other nutrition-related problems. Seeds are highly palatable and preferred by birds, but nutritionally they are incomplete, lacking vitamins, minerals, and protein. Fruits, vegetables, and greens should account for no more than 20-25% of the daily diet. Pellets are the ideal diet and should ideally represent approximately 75-80% of the bird’s diet. Converting seed-eating birds onto a formulated diet is not always easy. Consult your veterinarian if you encounter any problems with this transition or with the health of your bird. In general, a bird that is eating 75-80% of its diet in the form of pelleted food does not need supplements. Macaws do not need gravel or grit because they remove the outer hull of the seed before ingesting the kernel.