[Crowbob]

Groundhogs, like Ted Nugent, do not compromise.

The natural reflex of the trapped animal is to move away from the trap door when it slams shut. Then they push, gnaw, scratch and otherwise try to escape. Me thinks the smaller spacing gives 1) more strength to the trap and 2) smaller openings to prevent the animal from entangling itself. I've seen rabbits nearly destroy their mouths and noses trying to get out.

Mousetraps do not work on chipmunks. It just scares the bejeezus out of them and thereafter ultimatley renders the traps useless on the little buggers because they're smart.