There are questions and answers about snakes, on Y!A already but suggestions like secretary birds and mongoose were given, which do not live in US and UK. so any ideas that can work in US?
My friend is living very close to woods and cornfields, so they can cut back their own shrubs and grass but she thinks they are coming from the above.

Is it true that turkeys and ducks eat snakes? Does anyone know if lemon grass, or mint puts them off or anything else that does?
Thanks
Additional, thanks for that what sort of cat litter? We seem to have loads od different sorts here.