Harrison's Bird Food High Potency Coarse 1 LBUSES Year round formula for all medium to large parrots, especially African greys, cockatoos, large conures, eclectus, macaws and pionus. Other species may be switched to Adult Lifetime Formula after a 6 month conversion period. Conversion: All birds should start out and remain on High Potency Formula for a period of at least 6 months. Special needs: For birds that are moulting, overweight, underweight, particularly active, housed in a cold climate,