One time we left Nacey in the truck for a couple of minutes while Justin and I ran into the store. We don't usually take the dogs anywhere with us. However Nacey took a training class at PetSmart, which is about an hour from our house. On our way home we needed to stop at a store. Her class was late so when we got out is was dark. It wasn't hot out and with the sun down I wasn't worried about it getting too warm in the truck. Nacey was exhausted from her class and was passed out on the floor of the truck. I ran in, got what I needed, gave it to Justin, and while he got what he needed and paid for everything I went back to the truck. I was back to the truck within a matter of minutes, I was freaking the whole time I was in the store though. That was the only time I ever left any of the dogs alone in the car.