When sealing up cracks around the house, resist the urge to use only rubber or silicone caulk. While these materials do seal up holes, they also can be easily chewed through by wild animals like mice. Instead, plug the cracks with a bit of wire mesh from things like pot scrubbers. Then fill the openings with something called “expanding foam insulation.” The combination of the two will both insulate your home and make it completely unappealing to wild animals.
ANDREWS MCMEEL SYNDICATION