I have 30 chicken hens,3 turkeys(males), and 3 ducks(female) living all together. The turkeys roost right among the chickens and the ducks usually sleep on the bottom of the shed in the wood shavings. They have all been raised together since they were babies and I have not had any problem between them. Now that the turkeys are 10 times the size of the chickens they seem to be protective of them. I have deer netting over the run as I lost a chicken, a duck, and a young turkey to hawks. Now when ever a hawk is near the turkeys sound the alarm and wait until all the chickens run inside. The hawk sat on the fence looking at them through the netting and the turkeys watched them and sounded off trying to scare them away. Going back and forth watching them. The turkey also chases my little dog - doesn't hurt him - but definitely keeps an eye on him. My little shih tzu doesn't hurt the chickens but sniffs their butts and wants to play! I am grateful for the loud alarm as I run out and can chase whatever away. If it wasn't for the netting I'd be minus a couple more! Is there any reason some people say to separate them? So far so good.