Despite all of this, the dog seemed to be in good spirits.
Offices took it to the Milwaukee Area Domestic Animal Control Commission, better known as MADACC.
Doctor Libby Gutting checked him out. She tells us you should call police if you see a dog alone in a vehicle for more than an hour.
"An animal could suffer from hypothermia or even pass away from that so we definitely don't want to leave animals outside in any sort of condition especially for a car that's not running," said Dr. Gutting, Medical Director of MADACC.
Dr. Gutting says the pitbull is in great shape.
If his owner does not come in to claim him in five days, he could go up for adoption.
"Our concern is that this person has an issue with the way they need to care for their pet which means they need help," said Dr. Gutting.
The captain with Milwaukee Police District 2 tells TODAY'S TMJ4 the owner, in this case, could face an animal cruelty charge.