I'm pretty sure my girls have cleaned out just about any snake that was on the main property...I've seen them running away with little ones and once my biggest Buff Orp went prancing through the yard with probably a 3 1/2 footer dangling from her beak one day...between my chickens, barn cat and runner duck I'm pretty sure we are predator and varmint free..squirrels=GONE, ticks=GONE, snakes=GONE, fire ants=GONE!!