Oh yeh, those little rat terriers are nuts, they are an asset around any farm. I used to wrestle with one a friend had, he'd draw blood right through a pair of heavy lined welding gloves.
If it comes down to having to chute' em' with your .22, if it helps. If you scare them in the early daylight, and set down, they'll usually be back out withing 15 minutes, if you don't move. They're wanting some breakfast. Stay still, let them come out belly down, give them a couple minutes...
Yup
They can climb pretty good, I've seen them 15 feet up a tree before, when they couldn't get to their hole. The little guys will use their little paws to reach in, so narrow openings don't help much, but if you get it while it's young they are actually delicious. If you end up popping him...