the confinement of all of them together is the issue .. id section off an area, and use food to direct traffic, to keep the groups seperated if you have to confine them. feed the older ones first, and then open the section for the younger ones .. they likely will be like that until theyre all sexually mature, then it will be 'less' brutal lol .. they probably still wont be friends ..its better to just leave it open so they can avoid each other if theres not a predator problem, if there is, id work on that .. a good pcp, and a shovel is in order ..