A few years ago I was taking care of a special breed of tom turkey that my friends' daughter had given her, I had the tom turkey in a chicken tractor down in our lower field, that tractor was surrounded by 1" chicken wire covered by welded horse fencing, which I figured could stop most creatures, however a large dog (coyote?) pulled all the wires apart making a very large hole, it got inside and nearly killed the turkey, it was in such bad condition I had to put it down. The footprints from that canine were large. Anyway, I kind of figured that if I had to really stop creatures like that, I might have to use pig wire, kind of spooky to think that there is an animal around that could go through what I thought was a secure chicken tractor.