Burger King wants everyone to enjoy their Whoppers. Last week, the fast food's U.K. branch released a video of a guide dog being successfully trained to sniff out flame-grilled Whoppers for his visually impaired owner, British hockey player Nathan Tree. Tree jokes in the video, "When you travel, it's hard to find something to eat. I didn't really know if it was possible, I just thought it was a cool idea." The clever ad details the process of training the dog, Flynn