I saw a testimonial that bobcat scent will make them flee the building. Not sure how bad it stinks. They were selling crystals that you could hang up in old nylon stockings. I was looking at that myself. I've read that real peppermint extract on cottonballs deters them. Glue traps are horrible but effective. Some of the poisons, just reading the warnings scared me to death. Snakes down the burrows?