My jenday is 9 years old. Used to let me pet him, cuddle with him on the couch gave me kisses. He shares a cage with our cockatiel. They have shared a cage for 8+ years. He normally is very sweet to our cockatiel and cleanes her feathers. Lately he has been attacking her. Attacking me and shreading The paper on the bottom of the cage through the bottom grate. Today I was trying to work with him with some carrots on the floor. He went after me and got my thumb and wouldn't let go. He drew blood. I put him back in his cage and shut the door. Any thoughts?