Our cats lately have been indoor cats so haven't experienced the great out doors. Zippy, our calico cat, used to ride everywhere with us, along with Carlie, our Sheltie at the time. She would always ride back on our bed or curled up on the floor with the dog; days at the CG she spent stretched out on the dashboard in the sun. Nights were spent with us on one of our twin beds. We used a cedar chip litter (no litter odor) in front of the seat or in the door well when under way. I think if we still had a cat it would be in a carrier, as our dog is now, when underway.