6' weld wire fence, with several strands of electric on the outside and if you can manage tall enough posts add some more above the weld wire. Put the bottom electric wire as close to the ground as you can so help prevent things from digging under. So far so good here, tho coyote did get a bird that had flown over the fence, so far has not gotten into the pensUnfortunately my area has coyotes that are out during the day. Even though I lock my flock up each night, I had one yesterday take out a rooster and a hen in broad daylight just around 1:00pm. Don't know what to do because I would like to continue letting the flock out to roam during the day.