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Happy Birthday, Bo! You're 4 Years Old!Wag those tails! The First Dog adds another candle to the cake on Oct. 9
Credit: Cliff Owen/AP
Updated: Sunday Oct 09, 2011 | 06:00 AM EDT
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Now that he's got four years under his belt, Bo Obama has become an adult! We'd like to celebrate our favorite First Pet with a look back at his life so far.
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