I've never used medicated feed, and never heard of worming chickens until reading BYCs so I don't have plans of doing either.
My father had chickens for twenty yrs and never did either and never had a chicken die other than the ones that met a hatchet or weasel and once the neighbor's dog.
My father had chickens for twenty yrs and never did either and never had a chicken die other than the ones that met a hatchet or weasel and once the neighbor's dog.