Towns and cities are havens for mice and rats, and fields for moles and other burrowers. Vermin catchers make a career out of ridding clients of these pests. Many use ferrets, cats, or even weasels to find vermin and dogs to kill them, while some employ poisons or traps. Despite the menial nature of the work, vermin catchers are held in high regard and often make good money, since their services are vital. GURPS Merchant to hawk their services, and Cyphering to count their wages. Carpentry allows the building of traps, and First Aid comes in handy in the field.