My wife and I recently took in an abandoned cat. The neighbor's up the street threw the poor girl out when they had a baby. Anyway, we have been slowly introducing her to our two other cats with mixed results. They are not ready to live together quite yet, and unfortunately our house does not have doors separating the rooms...odd, I know, but it's an old house that has been gutted before and apparently someone took all the doors. Anyway, we've been letting the abandoned cat take shelter in our unattached garage. She has a heating pad, a shelter house full of straw, and cozy blankets on an old couch. We also put a litter box in there and she uses it well. She seems to love it. However, as winter sets in, the garage is getting a little colder...she is able to stay warm with the heating pad and the straw shelter, but my concern is the cat litter. It gets cold as the weather gets cold. It's not horrible, but it's a little chilly. Will this discourage her from using it? Any suggestions to keep it warm? Thanks.