The Obamas' dog, Bo, just celebrated his 7th birthday - here's a look at all of America's first pets

President Obama's Portuguese water dogs, "Bo" and "Sunny," are just the latest "first pets" to live at 1600 Pennsylvania Avenue.

In fact, nearly every commander in chief has kept a pet during their term.

America's first families have shared their quarters with an impressive menagerie of animals, from snakes to ponies to sheep.

In honor of Bo, who celebrated his seventh birthday earlier this month, here is a list of the presidents' "first pets."

Pets are in chronological order of each presidents' term, beginning with President Theodore Roosevelt in 1901.