In the 2010 film Marmaduke, the dog Marmaduke wears a pair of Ray-Ban 4115 sunglasses while cruising though Caifornia in a Mini Cooper.

These Ray-Ban shades not only look good on dogs, but are great for people as well. Find them on Amazon for $65.00 - $88.95.

Reference: Ray Ban RB 4115, matte black frame with gray green lenses (color code 601S/71)