Combine an IPM program with a few of these DIY deterrents and repellents, and you can come up with a successful comprehensive plan to get rid of mice naturally. How Poison Works: Most rodenticides on the market today are anti-coagulants.
Rats are rodents that can spread disease, contaminate food and chew up property. Rats burrow in the ground, forming tunnels with one main opening and one or two exits. The 2- to 3-inch wide entrance hole is usually found under a covering like a low plant, mulch or debris. Before closing up burrows, the rats must be eliminated or they will just re-open the holes.
Soldiers, of course, dig holes, or used to, and called them fox-holes. And foxes do dig holes, though our foxes seem to prefer an abandoned tree house. Rabbits dig warrens, which are holes in the ground, though they must dig them in the densest and most inaccessible brush thickets, because I never find them.