I'm defencless against them there at home. Three rail fence with two strands of hot wire to hold the cattle/calves. Yaps can go under anywhere they want. Its either traps, or the AR propped up under the upstairs bedroom window. Don't like the idea of shooting into a bunch of panicked running cattle in the dark though. That fence is basically a visual barrier. My dog goes out with them all the time, and they never even look up at her. But let a coyote get in there messing around, and they go berzerk! I'm more afraid they'll run through the fence than a coyote getting a calf.