Harrison's bird food High Potency Coarse is recommended for Amazons, Cockatoos, Eclectus, Macaws, and Pionus. Harrison's High Potency Coarse should be used as a year round diet. Harrison's High Potency Course is the largest nugget size. Harrison's Bird Food provides proper organic nutrition for your bird's lifetime care. Harrison's Bird Food was created by avian veterinarians and nutritionists with the health of your bird in mind. Harrison's Bird Food formulas require little or no supplementation. All Harrison's Bird Food is a daily diet for maintaining healthy adult companion birds. The true natural, nutty flavor of the organic ingredients , along with the crunchy texture of Harrison's Bird Food are what birds really go for.