One of ours got stuck in a vehicle which I only drive in the summer for 3 weeks. She survived, but is always few pounds lighter than her sister. She is always in survival mode now.. always starving.. and runs to us whenever she hear 'canned food' noises. So we trained the other 2 cats that way. If you are afraid to starve them, simply give them least favorite dry food... and in few days, open their favorite.. Works the same, but more repetitious before they get it!![]()