The White House Blog gave us more details about Bo's sister:
"Sunny was born in Michigan in June 2012, and arrived at the White House today, just like Bo, she's a Portuguese Water Dog, which works great for the Obamas because of allergies in their family. Sunny is the perfect little sister for Bo -- full of energy and very affectionate -- and the First Family picked her name because it fit her cheerful personality."
The First lady, tweeted a photo of Sunny & Bo:
"So excited to introduce the newest member of the Obama family -- our puppy, Sunny!"
Credit: courtesy of Michelle Obama
We wish them the best of luck with their new puppy, we all know how amazing it is to have dogs and the more the merrier!