We are officially into the hottest stretch of summer and one thing's for certain: baby, it's HOT outside. But it's a great day for this puppy who's just discovering air conditioning in the car for the first time. Do you leave your home's air conditioner on for pets during the summer? Pet owners are divided on the issue: the utility bills get so expensive, but you want your furry friend to be comfortable. ASPCA veterinarian Dr. Helen Myers confirms that it's the old classic: it's not the heat, it's the humidity. She recommends keeping the AC around 70-80° during the hottest months of the year if the humidity is high enough to cause a dog to pant. Of course keep an extra close eye on your pets when they are in the car and never leave your furry friends in the car unattended.