Can I keep chickens, ducks, geese, and turkeys in a 75x200 ft pasture, 1/2 wooded (scrub-oak and pine trees) 1/2 field? The pasture boarders a large pond for the ducks and geese. I know about blackhead with the chickens and turkeys but is there less chance of the turkeys contracting it in such a large area? They will all have separate coops aside from the ducks and geese, and i'm guessing the turkeys will just roost on the garden fence or in the trees. Can this work or no? any suggestions?