Today's side deal cleans up dirty dogs without the extra mess. For $12, you get $24 worth of self-service dog washing and five fresh baked treats from Four Muddy Paws. The Riverfront Times named the bark-worthy boutique the Best Dog Wash, and St. Louis Tails readers voted it the Best Pet Boutique, among other awards. A basic wash is $12, so you can bathe two pups, or come back a second time when your puppy gets muddy again, or you can splurge on the premium wash (includes cologne, $14) for extra dirty doggies. Redeem your Groupon at the boutique's Edwardsville, IL or St. Louis locations.