I just purchased a new blue crowned conure. She is about 4/12 months old and seems to be real sweet. She lets me pet her head, back, and even pick her up by her back and set her on my hand. My concern is that when she is sitting on my hand she occationally will ben down and start chewing on my finger, and somtimes bites very hard. it doesnt seem to be an agressive thing but it really hurts. Any help on how to stop or prevent this behavior?