Family pet Bo (C) walks up to US President Barack Obama as he and First Lady Michelle Obama read a book titled "Chicka Chicka Boom Boom" to children during the annual Easter Egg Roll at the White House in Washington April 25, 2011. [Photo/Agencies]

Malia Obama holds her dog Bo at the Easter Egg Roll, at the White House in Washington April 25, 2011. [Photo/Agencies]

Click for more photos