They, obviously, use dogs for a lot of their promotional material.
Their most recent promotion is "Let's Rock!" "Let's Dine!" etc. with respect to their 3G service for mobile browsing.
What they've been doing is placing (via image manipulation tools) some wacky hairstyles on the dogs. I've driven by some bus shelters that had the ads and thought they were cute but I howled when I saw the Boston and Pug hairstyles..