We are complete novices at this so I had a question that may seem dumb. We got 1 hen, then a friend gave us two more...only they turned out to be roosters. We are keeping them separated by a chicken wire fence and they seem to get along ok. We have these as pets and for the eggs, not for chicks. Question is, can we keep 2 roosters and 2 hens separated? What problems could exist?