I understand the concept of putting a 24" buried barrior around the chicken run. However, my coop is 4x8 and sits on a 4x8 slab. Do I need to do something around the areas the the run and coop meet? Or do I need to just put it all around the concrete slab so that can't burrow under the slab? I hope this makes sense. If I need to go around the concrete what is the best way to attach it to the slab?