So I got a bare eyed cockatoo not long ago and Iām trying to train him to step up but he only does it when he wants to go somewhere or wants on my shoulder( since he prefers not to fly) and heās not motivated by treats enough to step on my finger but he loves scratches.... anyway when I put my finger up to his chest/foot area he puts his head down to block me(like he wants scratches) and if I push through it he will give me a nippy bite so anyone have any ideas to train him to step up,any help is appreciated.