Because of my hilly terrain and the expense and difficulty of fencing, I'd like to let proposed new turkeys mingle with chickens, Guineas, and ducks (coming soon). Each would have its own species-specific shelter, barricaded against night-time marauders. I certainly don't want my turkeys wiped out by disease, though. Would chicks hatched in a mid-west hatchery have come pre-infested? If they eat earthworms here (we have plenty), would they likely get infected? Guineas tend to go where they please--would they cross-contaminate even separated turkeys?