My son, the dog and I waited in the car while my wife picked up a few items at the store. I decided to sketch the interior of the car, which wasn't looking too exciting, so I added the dog after the fact. There is a strong line going through part of the dog. I probably could have taken more time to blend it into the rest of the picture, but I didn't have enough time. I'm still happy with the drawing.
Drawn with a Sharpie pen.