But they can also contaminate the environment, and be quite destructive. Mice have been known to chew through electrical wires, fiberglass insulation batts, and rigid foam insulation. Generally, mice have no attraction to spray foam insulation, as it doesn’t represent a food source.Click to see full answer. Moreover, will expanding foam stop mice?Use expanding foam to prevent rodents from moving into your home. Mice and other rodents seek refuge when it begins to get cold outside. It is best to prevent the rodents from getting into the house at all, and expanding foam is an inexpensive solution to a potentially big problem.Secondly, do rats eat Styrofoam? That said, you do NOT want them eating them if possible, or eating much. The styrofoam ones are not editable or digestible and are major choking hazard since styrofoan is not inhale-able (would block the airway if swallowed), so you might want to skip the idea if they are it. Also asked, what will mice not chew through? Unlike insulation, paper, or even drywall, mice can’t chew through steel wool, and even if they did, they’d be dead before they made it into your pantry. Stuff any holes where mice could be entering with steel wool and you’ll keep them from sneaking in.Will mice chew spray foam?Rodents can chew through spray foam. Just use it as a filler or backing material. Then enmesh an exclusion material into the foam.