Boo, voted the cutest dog on the Internet, is a small toy breed called a Pomeranian. Boo has a Facebook page with over 5 million likes as of 2014, making him one of the most famous dogs on the Internet.
The Pomeranian is a member of the Spitz family and descends from the larger German Spitz. This breed is very active but its small size means it doesn't need a lot of room to exercise. They do require regular brushing of their double coat to keep it free from mats.
The Pomeranian needs a lot of attention from its owner and can develop nervous habits like nuisance barking if left alone too long. Caution should be used with small or overly exuberant children as they may injure the small Pomeranian accidentally. Overall, due to their size and intelligence, this breed makes a great choice for a companion.