What does this mean? Who knows? Here are some guesses, from the readers at Swanksigns:

• The happy, smiling sun will kill your puppy.
• Don’t let your puppy drive in the sunshine.
• This combo may turn dog into looming castle.
• Do not let your dog drive into the sun, or they will be killed with green fire.
• Attention! Dogs will drive to the beach on sunny days.
• Car-driving dogs make the sun happy and then they die.
• Warning: Car-driving dogs in sunlight may cause harmful power plant exposure.