Liz- is your garage connected to your house? If so, this might not be a huge issue, but if not...if it is a stand alone, you might want to make sure she has proper bedding. If you already know all this, please ignore. Kitty should have a 4 inch thick layer of straw...not paper/blankets/etc., but straw, and it should sit off the floor...maybe with a pallet, or something, so that it isn't sitting on the concrete. Then, you can line the bed with something, but she will really appreciate the straw. If you can build up the sides, even a large cardboard box (as long as it cannot absorb moisture from somewhere), it helps her feel cozy. Since you plan to ultimately bring her inside, why not experiment with a litterbox out there? Use CAT ATTRACT, probably double the dose suggested, and scoop it every day or so. You might be surprised at how quickly she takes to it.