[jmatta]

All 986 S cars have a center (third) radiator.

Not to be cruel or insensitive, but thank goodness the incident was not more serious. Another driver may have swerved into oncoming traffic to avoid the dog or been injured because of the pet owner's carelessness. I wouldn't feel at all bad about calling upon their responsibility. If it were their child that threw a rock at your car (don't ask me why I bring this up; been there) you would certainly hold the parent responsible?

Pet owners have responsibilities and I expect them to abide by them.