Here's an interesting read, Linda: http://www.usask.ca/wcvm/herdmed/applied-ethology/Bottle-raised males can be very dangerous.pdf
Flock management is serious stuff if one wants to delve into it and really study their birds and interact with them more on their level. I believe that is why I've never had bullying, feather picking, integration problems, manfighter roosters, pecking order issues, etc.
One can study behaviors and either deal with them or cull them from the flock and the genetics....but every rooster is going to have a surge of hormones eventually as he becomes sexually mature and this is to be expected. If we kill every rooster feeling his oats, then soon all we will be breeding is roosters with low testosterone levels.....and that won't last for long, for obvious reasons.
I wonder how people would react if someone suggested killing every dog that~ while he was eating~ growled or lunged at a human who came near, without even trying to train the dog about this issue. Sure,if you truly put in some training time with a rooster and it doesn't yield good results, go ahead and trim his neck...and rightly so...but kill every rooster who is indulging in normal rooster behavior and is confused enough to turn it on a human? Not a good idea.
This is very interesting. Learning a lot.