We're building our run right now. The coop is elevated, at the back corner, where the run will be, it's up quite high, about three feet. Should I put the wire all the way around the coop, continuing onto the run, to keep everything out from under the coop through to the run, or just do the back edge of the coop out to the run? I'm thinking the birds shouldn't be able to go beneath the coop, but then I wonder why not? Any thoughts would be appreciated!