the ripped up backs you are talking about is an issue with breeders. using to large of a rooster causes it, also you have to keep their nails and spurs trimmed. some feathers missing from the back is normal, it happens when a rooster chooses a "favorite hen". if you add more room to the run it will usually slow down. myself, if I have overly active roosters I move them between pens of hens to give each of the hens a break.
on the other end of that, buying just hens is almost as cruel. have you ever seen the pictures of dumpsters behind hatcheries? that's why we decided to work as breeders instead of becoming a full blown hatchery. we don't sex our chicks when we sell them, we will breed sex links; but you still get them in a mix of males and females. I don't mean this to start an argument, and I understand people not wanting fertile eggs to eat.
I would like to see a place set up where you can take these extra roosters to be finished off and sent to the food banks. the US government wastes enough money on other things, why not something like this?