They are raised at a place just outside of the town where I work. Magnificent roosters. Here they are each tethered to a horizontal oil drum on legs with doors cut in them. They get exercise, have their own food and water supply, shade and shelter.

I don't know if they get any handling or training, have never stopped there. There are probably 100 such birds being raised at this place, judging by the field full of drums. I would say that their life is not bad, at least up till the fight.