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True story: I was once walking my dog at a highway rest stop when my mutt started straining toward some nearby pups, whose owner pulled them away in horror, saying "These are show dogs! They cannot play!" Well, fancy dog shows, you can keep your animals who are too special to romp around in dirt. Every beloved scruffy pet has that quirk that, when you think about it, might be why you love them in the first place: a habit of sleeping on your pillows all day so that when you get home your bed smells like crackers, or the characteristic trait that led to her name of Puddles. Best of all, these pooches get to play.