Pound for pound, a weasel is one formidable predator. A short-tail weasel CAN sneak through 1" mesh chickenwire. Check out "weasel box" on Youtube and you'll see just how easy a trap is to make. Weasel are VERY cagey and will avoid an open run if at all possible in favor of sneaking "through...
I use a simple "weasel box." It's just a wooden box about 8" square and 18" long, hinged on top, hardware cloth on one end, wood on other end with 2" diamater hole. Just inside the hole place a simple rat trap and place your bait (raw meat of any type) past the trap and a little bit on the...