Hey guys I usually take my shell off my otter every year and tub it up for mice sake, but we had a mean cat running around so I didnt worry about it "lazy" sure enough had about 4" opened up on the side and a nice little mouse house made. Wal mart had denim iron patches for 89 cents foot by foot and it worked awesome. Just putting it out there in case anyone else cat didn't do their job. P.s. Super excited for ice when we get back from Florida after New Years