This Week's Cutest Twitter Pics: Tired Puppies, a Goofy Guinea Pig and More!We put the call out on Twitter for your cutest photos and you delivered! See our first-place furballs and some runners-up from our daily #cutepic photo contest

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DOWNWARD DOG

Now there's a sleepy head! We hope the pup (@ Mobilehavoc) stayed awake long enough to know he was a runner-up on Tuesday!