Sandi, When you go to get her out of her cage, are you telling her to STEP UP in addition to giving her your finger?
I have noticed that Diego will bite me if I do not tell him STEP UP first, but just "give him the finger." (

) I am not sure he knows what is happening if I just shove my finger at him. On the other hand, if I say, "Step up," wait about one second and THEN present my finger to him, he does exactly what I am asking.