I think this just might be a vent so I don't ring Clover's neck. He can be cage aggressive so a lot of times I will get him out with a stick or just let him come out on his own if he looks like he wants to bite. Once he's away from his cage he's really sweet. So today I put my arm in there and he lifted his foot so I thought "cool, he's going to be a good boy". NOT!! He started to put his foot on my arm, he also reached forward with his beak and as he was using his beak to climb up he got a hold of my skin and slowly and deliberately pinched really hard until it broke the skin. This is the second time he's done this and I fell for it again. Right now he's sitting on the kitchen counter by himself so I can continue to be nice to him when I go back.