Oh how I wish I could keep all of my dogs together. My rottweilers stay together and my corso stay together but not all of them at the same time. My females are not the the problem it is my males. Actually it is on male. Deisel my male rottweiler doesn't care for any other male dog even if they are altered. He is altered and has been since a very young age but still is very dominate. I live on 4 acres and all of it is fenced, it is split so everyone has plenty of running room. All of my dogs are indoor dogs and we rotate 2 at a time that are allowed free roam in the house everyday. So it works out pretty good.