mouse proofing idea

hey all. just wanted to report that I finished winterizing for the year and a friend gave me a tip I though id share. Had several large openings I needed to seal up from an campsite repair. I packed them with loose steel wool and situated it how I wanted (leaving it uncompressed as best I could) then I injected spray foam insulation through the steel wool. Thought here being that the spray foam would fill the holes and the steel wool protect it from being chewed/clawed through. kept working the foam until I was confident it was well dispersed then taped over it to keep it from dripping/expanding out while it sets. Not sure yet how it will hold up by my initial perception is it will be much better than anything else I came up with.