In a post on my blog dated 5/15/09, I wrote about a study I ran across that talked about not leaving your pet in the car during the hot summer months.  I dropped in my vet's office yesterday to buy more doggie toothpaste and they have this sign outside their front door.  I think basically it's saying you shouldn't ever leave your pet in your car.  Much cooler than 50 degrees and it might get too cold!