I have a pair of black Spanish turkeys in with my chickens. They do fine with them. I had to separate them from my Silkies, they plucked all of their crests off. Not in an aggressive way, they weren't mean to them, they just did away with their crests and the Silkies would stand there and let them do it, with their eyes closed, like they enjoyed it. I guess they thought they were doing them a favor