Are going, they will run up everything, including your pant leg. >> bad. very bad. >> the solution? as it so often is, duct tape. >> how many times has a rat gone up your trousers? >> actually, it's happened once. >> that's enough. >> with merlin on a leash and nine other hands rolling with us, the hundred the begins. the dogs quickly catch a whiff of vermin. >> get the rat, come on! >> get 'em, merlin. but the rats escape from under a garbage pile and into a minivan. >> that's frustrating. the dog can't get in the motor mount. what are you going to do? >> let's move on. >> the rats are playin...