Oh! That's a little different than what I was thinking. Only 3 options come to mind.
Pet Mongoose
House Chicken
Moving to Alaska or Ireland
I imagine snakes are prevalent where you are.
Imp- Hope your friend finds a solution.
I've heard that, but think it's a fable. If you are having snake trouble couldn't hurt to try. Make sure the hair is cut short in case the chickens eat it. Also try searching the predator section for snake solutions.
Imp-Not many snakes here.