If black head (histomoniasis) isn't a problem in your area, chickens won't have it to pass on to your turkeys. I have never had it show up here, some folks in other areas have. To see if it is a potential problem in your area, either contact your local Ag Extension or see if others in your area have turkeys and chickens. It's a protozoan parasite , it has to be there before any birds can pick it up.
If your turkey tries to mount a chicken hen when breeding season comes in, you will start finding dead hens. I have had it happen the one winter that I put them all together. It doesn't appear to be as bad if they are free range, I can't verify that because with the winters we have up here my birds are still locked in pens when the season starts.
If your turkey tries to mount a chicken hen when breeding season comes in, you will start finding dead hens. I have had it happen the one winter that I put them all together. It doesn't appear to be as bad if they are free range, I can't verify that because with the winters we have up here my birds are still locked in pens when the season starts.