Just to add I have 5 parrots. 2 we're handreared, the other 3 were not to my knowledge. My hahns came from a pet shop and was the most aggressive little bugger when I got him. I'm talking try to take your fingers off if you get too close aggressive. Now he is the sweetest little thing, with me and me only. He is extremely bonded to me and will attack anyone who gets too close. One of my ow Amazon's can only be handled by me. The other is very much a no poops given old guy and is happy to be left to it to be honest! But he's not aggressive and moves away if he's upset. We bought our yellow crowned amazon as a baby and he is handreared. Started off going to anyone. Had him a year and he's a mommy's boy. Will bite my partner if he wants me instead and will ignore my partner if I'm around. Then my Patagonian. We believe he was handreared at some point and treated very much like a baby. He is oven ready and has been ever since I got him. He bonds very strongly to one person or object - coconut head toy is his current gf - and he will scream the place down if he can't see it. When he was bonded to me it was constant contact calling everytime he knew I was in the house. And I mean constant. I had to be looking at him and talking to him only for him to calm down. No looking but having a convo with someone else. He did get better over time but even now I can't take him in a travel cage without him freaking out due to how often he's been passed around. He will also attack ankles if he's protecting me. So to be honest the most well rounded of my lot is my old man Amazon who I took on as a rehome. He's getting on in age but to be honest he hasn't really changed. You pretty much get what you see with him. He's happy to interact and he's happy to just do his own thing. He's the only one I would be happy for my family to interact one on one with if I'm not around. Not all rehome had a bad life and not all who had a bad life will stay aggressive and fearful. Any bird you get you need to build that bond with and learn to trust and respect each other.