I'm somewhat a skeptic when I read things that claim to do something that doesn't seem possible. (example: a bird food that claims to effect a bird biting?) We adopted an Amazon that is 35 years old. She has been fed nothing but seeds, peanuts & wheat thins. We were warned that she BITES! (we have scars to prove it). After being strictly on these 2 foods & ONLY an occassional peanut for a treat, she has almost come to a complete halt in her aggression!