We have two roosters that were raised here as a flock from our brooding hen. They are mean and attack the other hens. We just had a new babies from our brooding hens and they are getting bigger now and can escape but the roosters chase them if their mom isn't around. The roosters will chase them, corner them, then they hop on top of them and start pecking them or the will pull out multiple feathers from the hens back. One was attacked last night and it drew blood (not too much but it's a banty and a mama), we have witnessed them trying to hurt them several other times, luckily we were outside at the time. One hen was found dead a few weeks ago, it was half eaten and we don't know what killed it but the crows were eating off of it when we checked. They fight over food and the will attack their siblings out of nowhere. What should we do? Is it because of the babies and all of our hens are being mama's except for the new hens that just started laying? Could it have something to do with their food, we feed our chicks a medicated crumble and all of them seem to like that food more? We have separated them during the day and only the babies and the mamas are in the pen area the others are in the yard. We have another rooster (banty rooster) and he is nice and protects them but the other roosters are bigger. They only have problems as we lock up the chicks and moms. We leave them out and leave a hatch open to get in. They get to roam until they want to go in. It's concerning and I raised the chickens, I love them but if we can't figure anything out, we have to put them down. Please help, any ideas needed.