(sorry for the rambling) my dad just got a Quaker Parrot for the family, He/she is 1 to 2 years old. The original owners neglected him/her and its unknown how much handling hes actually had. Then my cousin had him for just a month and her kids used to occasionally beat on his cage. He has only been home for about 2 weeks but he is still VERY AGGRESSIVE, he screeches throughout the day, sometimes it seems like he wants attention and I'll sit with him and talk to him and starts screeching when I leave the room. He tries to bite anyone that walks by his cage, he acts like he doesnt seem to know how to play with toys. He lets my dad handle him and will step up on his hand.I know it might take some time I was wondering if any one has tips to this situation.