I hadn't heard about the peppermint trick but heavily depend on the CCI Quiet ammoI have found success with extract of peppermint . mix it half to two thirds with water answer put it in a spray bottle. Hit the spots you think they are entering, then mist it all around. Will also give the house a nice peppermint smell. Works for most 4 legged pests. If you catch them outside 22lr works too. If you live in town and you can be out of sight , CCI quite's normally make less noise than a pellet gun. Just watch your trajectory.