I have 2 turkeys in with my free range chickens. They do ok. I did have an incidnet where I had some young(6-20 week) chicks that got to go out into the "big pen" since they were big enough to be without the heat. I found quite a few a few days later that had been killed. I figured squirrels(they can be evil) got in, though they had never hurt the bigger chickens. Later on after moving the chicks out and letting them get again bigger, I put them back in and found the culprit. My two turkeys were stalking and hunting these young chickens. They would get down low, herd them into the corner and then attack. It was kinda scary to think that my Petey(my Royal palm turkey, she is my baby) was doing this. But now I know she is fine with the adults but will hunt the littler ones, I just have to make sure she is separated from the juveniles.