Dog Night

I was just watching ESPN and found out that its "dog night" in Detroit for the Tigers game. It was so funny I had to put it here. This brought to mind several questions. Do you have to buy an extra seat for your dog? If you do have to buy an extra seat for your dog how much does the "dog seat" cost? Is this Detroit's way to sell out the stadium, by selling a few thousand seats to dogs? If the dog runs out on the field, who gets ejected, the dog or the owner?