I tried 'reconditioning' and it didn't work for mine, but it's worth a shot.
Then when it didn't work and I realized that I was afraid to go in the yard/pen/coop, I put my foot down and said no, he's gotta go.
One thing that I didn't realize was how hard it seemed to be on my hens. Although he was mean and rough on them, they seemed to like the fact that he led them around. They paced every night for more than a month. They really want a roo around.
So here come the young ones... I got some babies and now have another couple of roos. IF they are nice to me and the gals, they stay, if not, they go.
My suggestion when there's a mean roo and there are children who could come in contact with him - is to put the roo in a pot - not the children (LOL)