Long story short.. I have lost chickens to dogs, hawks, and owls (I live in the country). Hard to explain, but I had 2 chickens and a rooster who were getting along. I bought 4 new grown chickens and the hens I had killed them. I am devastated. I think my old chickens are fighting hens, hindsight regarding the facility they came from and their behavior has led me to this conclusion. My four new ones were bought at a nicer facility and I intend to go back and get more as soon as I get rid of the others who really did not lay very well anyway. I am keeping my rooster, he came from the neighbor and is a very nice rooster. Is there a trick to introducing new hens (all from the same group of course) to a single rooster? Thanks for your help!