We have been putting in a fitted kitchen and I was sorting through the last couple of boxes this morning and I found at the bottom of it some mouse droppings and a half eaten packet of custard! What should I do? There are no mouse droppings anywhere else that I can see. I would hate one of those mouse traps that snap shut on the mouse as I would have to get rid of a dead mouse then. Can I put down a deterrent or something. I have a dog so something that the dope won't eat!