It depends if blackhead is in your soil. I have no problems here letting turkeys range where chickens have been. I don't worm my poultry here.We are debating the option of letting them range. I know it's best for them, they are great foragers and insect controllers, but I worry about blackhead disease. I've had chickens on the pastures and farmyard for several years now, and had never wormed them until this summer. I might have to wait a few years and keep up the worming program before I risk it.
I'm leaning toward getting a heavier yet smaller variety that's not so likely to be flighty, like the Beltsville Small White, Midget White, Bourbon - or perhaps White Holland. And plan to snip wing feathers to keep them in, if needed.
I got some midget whites. They weren't that small. Bourbon are nice and seem the most friendly. I personally like blacks and blues, and sweetgrass, and.....lots to pick from.