Humans do the wildest things to animals - stick them with experimental drugs, mash them into cheap nuggets, mount their severed heads on dining room walls. Against this backdrop of chaos and mass extermination the Puppy Bowl seems fairly benign, as do all those other events, such as the Melbourne Cup, where animals are forced to play sports for our amusement. We know that humans like these games, especially when their bets pay off; but how do the animals feel? What's on a horse's mind when it finishes first in a race? Can an animal have some sense that it's won something, or, for that matter, lost?