We ordered 1 rooster in with our hens when we got our girls earlier this year. He was a Buff Orpington and everything was okay until about a month ago. All my chickens hatched on/around May 17th. About a month ago, Ernie, my roo, started his "boy" business. He bloodied a few of my hens combs, but we thought he was just immature. Last Sunday, he bloodied another hen's comb and tore a dime size hole in the back of another of my hens. I have quarantined my hurt hen "Ginger", and she is healing. My husband and I discussed whether we should wait and give Ernie more time to mature, but after seeing how bad he hurt my hen, and his behaviour seemed to be getting worse - not better - we decided to put our girls out of his misery. Ernie is now in the freezer, however, it seems my hens will be a little longer in getting over his aggressive behavior. Just tonight, I reached down to pet on of the hens, and she immediately went into the "stance" and was just quivering and shaking so hard I wanted to cry. Makes me wish we had realized what a little "Caesar" he had become earlier. We want chicks so we'll get another more mature roo in the spring BUT he will be watched CLOSELY. And at the first sign of hen aggression, he will join Ernie in the freezer. I read too many posts from people who've have chickens way longer than I have, who talk about Roosters who take wonderful care of their hens and are very gentle. That is what we will strive for UNTIL we find one. Just beware and watch closely. I am still so angry whenever I am reminded of how badly he treated my hens. UGH! Like so many others have said, the hens have to be the first priority - so watch them closely. Best wishes!