I won't leave mine out if I'm going to be gone more than a 1/2 hour for most of the reasons everyone else gave and one more I didn't see. I don't want them barking and disturbing the neighbor's. Right now the neighbors are great and I have 4 large dogs, 2 GSD's, a Rottie and a Pit mix. Them barking all day is the last thing I want. I don't need to see Animal Control in my driveway saying the neighbor's are reporting neglected, barking dogs.