I am a new bird owner I have had Polly for almost 2 months she is mature around 2 years old according to the vet I have had her vet check because I don't know anything about her history at all at the time I got her she was with a very young couple who had no knowledge of how to care for her and did not interact with her much. When I first got her she would step up and go to my shoulder she would play with my hair and jewelry and chatter away. Then one day I put my hand out for her to step up and she lunged and bit me very hard she would not let go she took skin and blood I didn't yell or jerk I did just what the information said and pushed back with my finger and put her down. However since then she lunged at me and has brought blood several times. She does not turn from me her eyes pin and she lunges to bite she talks with me all day sings whistle plays but if I move my hand close to her she will lunge I have taken her to the vet and she checked out as healthy and I changed her diet her prior owner was feeding only seeds I now have her on a proper diet. I have been doing training but I'm not having much luck I'm afraid my bird hates me and I know they are such loving smart beautiful birds I would like to be able to train her but I don't understand this behavior.