The usual diet offered to birds includes seeds, balanced formulated pellets, dried and fresh fruit, and fresh water. It should be noted that seed should be a treat, not the main staple because seeds are deficient in calcium, high in fat and phosphorus, and low in Vitamin D3. They have their role in the diet, but the birds need much more. Many owners and breeders provide a balanced nutritional supplement with key amino acids (such as lysine and methionine), vitamins, and sometimes probiotics are included in formulations to help keep the gut balance optimal.