you could turn off the car , lock it, then remote start it with the fob and it will run for 9-10 minutes. But you might run the risk of setting the alarm off on the car if the person decides to exit the car. Or you could be locked out of the car if the pet steps on the door lock inside the car. Usually if I leave a person in the car I leave the fob. But I don’t leave kids in the car only adults. I don’t have pets.