Have any of you resolved aggressive behavior towards other family members?

I have a bare-eyed cockatoo who was a rescue from a situation where over 240 birds were being kept in abysmal conditions. Apparently, the man had been buying up birds and reselling them.

Corey was definitely a pet in the past. We don't know how old he is. He's had a vet check and is healthy. He had a history of biting at the rescue.

We have had Corey almost two months now. While I've been nipped a couple of times, I have not been bitten severely. However, Corey has attacked my husband several times, and frequently postures aggressively towards him.

I know the standard behavioral treatments for this issue, and we are doing them as much as possible. My husband is giving Corey treats through the cage bars (with tweezers!) and is providing some things he really enjoys, like showers and music for dancing. I do everything I can to avoid situations where he can go after my husband. I also am careful to avoid any behavior that could be construed by Corey as potential mate behavior.

My question, therefore, isn't so much about treatment as it is- for all of you out there who have gone through this issue, were you ever able to resolve it? Or does it remain an intractable issue no matter what you do? If you were able to resolve it, how long did it take? I've read such varying opinions on this. I'd like to know, realistically, if I can ever expect Corey to be safe around my husband.

With our Amazons, we have found that it takes years of work! But, it is all worth it. We even have experience a role reversal!

My husband's Amazon hated me at first. I just kept at him with treats, singing, dancing, ferrying him around. He wasn't such a hard case - he hadn't suffered the kind of trauma your bird probably went through, he had just one adoring human all his life. I got to where I was allowed to carry him with me, and I put him on his stand by the couch one night while my husband-to-be was out of town. He ignored me. I made some popcorn and started watching a movie. After a while, I felt a feeling, looked to my left, and Ollie was on his stand, leaning as close to me as he could, beak open, wings trembling, WANTING POPCORN SO HARD I COULD FEEL IT. So I gave him a piece, and he mostly shredded it, and I wound up eating it quickly to make it go away because he would finish a piece and then beg, beg, beg for more - I didn't think the salt would be good for him. But it was little things like that, one at a time, until I became a flock mate. Not tolerated to scratch, but allowed to provide taxi service and food. Oliver was easy, but I've read lots of stories here about birds who came back from hell to be loving pets...it was often very hard on the humans and made them cry. I hope you won't have such a hard road in front of you.