That's funny, Angelwolf! My car lives in the garage, and to my knowledge I've never had mice in my car, but I'm pretty sure that they are, or have been, in the garage. I have a large bag of sunflower seeds, which are supposed to be bird and squirrel food on a shelf out there. There is a large hole in the corner of the bag, and sunflower seeds all over the shelf. I have 2 D-Con containers there, but it doesn't seem to be helping. Since my garage is attached to my house, and I am in and out of that connecting door many times a day, I'm surprised that they haven't entered the house. So far, so good. I don't know how much of a mouser my tiny wiener dog would be...... She would probably want to make playmates out of them!