I have a young bird that was parent reared but was hand held a fair bit to check crop etc as parents took a week to work the whole feeding thing out. He will fly to me if I put my hand out and crawls to me (he's a bit disabled in the leg dept) every morning to be fed. He eats out of my hand and when I try and put him back crawls and flaps straight back to me again. But he also attacks and growls at my hands and arms. Like he's just been sitting happily on my knee then decided to coo/growl and start trying to biting me. And he gives it his(or her) all, neck feathers up and it leaves a mark. So it's like he likes me and wants to be with me but also hates me and wants to attack me. Is he just nuts or is biting etc a normal behaviour and does he think I'm another male or something?