BOUGHT THIS FOR TRAVEL WITH OUR 2 CATS FROM MICHIGAN TO NEVADA THIS WINTER...WE SET IT UP IN FAMILY ROOM SO THEY COULD GET USED TO IT, AND THEY IMMEDIATELY FOUND IT TO BE FUN AND ENTERTAINING ! THERE SHOULD BE NO PROBLEM WITH THEM IN THE CAR AND THEY HAVE THE EXTRA ROOM TO SLEEP AND PLAY AS WELL (I BOUGHT THE LARGE SIZE ) IT FITS PERFECTLY IN THE BACK OF OUR JEEP GRAND CHEROKEE.