I fell in love with a cockatoo at a rescue today and was petting her through the cage. She was rubbing up against the cage and really seemed to like me and enjoy the attention. She seemed extremely docile and affectionate.. I didn't pick up on any aggressive body language. She was nibbling on my fingers and in retrospect, how stupid was I to be putting my fingers in biteable range of a bird I don't know... anyway, she clamped down on my finger so hard she ripped my fingernail clean off and punctured all the way through my finger. (I probably could use stitches). I did what I know *not* to do and screamed, but to be fair ripping off fingernails is *literal* torture. She got super excited and danced around after like she was really proud of herself. So my question is: should I take this as a sign that this is not the bird for me, or is it likely that she would not bite me like that under different circumstances (ie bonded, not sticking my dumb fingers in her mouth)? The rescue people said she's normally very sweet...