I protected my chickens for years with just chicken wire - that kept out the raccoons, foxes, dogs etc but last year a weasel got my rooster & hen (I was so sad). So I put 1/2" hardware cloth up for the top & sides of the coop and 1/4" wire buried 10" on the bottom. My last concern is the wood door to the coop. The door doesn't quite close snugly - more open at the top than the bottom and the largest space is about 3/4" wide. Is that enough for a weasel to get through?