Same reason people leave pets in the car. It’s not that they forgot, they were in a hurry to get to the food chow line in the all you can eat.
Witnessed this 2 weeks ago in Memphis, before I could go tell the manager to call the LEO, these 2 quite 300 pounder’s came out and drove off, poor little Malteese was in heat distress. I own dogs and know the signs. My babies which are small stay home in the AC when it is this hot.
Dumb sons-of-b*tches shouldn't take their pets out in the car unless they are going to the vet.