It sounds like he could be going through the TTs. Birds are very manipulative animals. They know how to twist their humans around their tiny little claws, and they use this skill with ease You've pinpointed the problem in your post. Taru finds enjoyment when he bites you because you give a reaction. Unlike dogs, birds become absolutely delighted when their bitten human companions scream in pain. Instead of yelling "OUCH" when he bites you, suck it in and shake your finger slightly like you're experiencing an earthquake. Taru will stop to correct his balance and there will no physical reprimand. After he stops, it is recommended to command an "Up" from him. Hope this helps!