When my Silkies and Turkeys were a few days old I had to separate them because the Silkies kept trying to peck the turkey's little tiny snoods off. Then they shared a pen for most the summer and did fine together, they were only a few months old though. Then all of a sudden in Sept the turkeys put a hit out on the Silkies (I think it was that whole snood thing back in July). It started off one day with them just chasing them a little. I watched them real close and when one of the turkeys snatched ahold of a Silkie wing I separated them. I'd read different places where people's turkeys killed their chickens so I didn't see any sense in risking it.