Mark Zuckerberg's dog, Beast, immediately became the latest internet sensation on Saturday, as Zuckerberg shared a picture of himself with his wife Priscilla Chan and their dog. Beast is a Puli, a type of hungarian sheepdog. "Celeb crush: mark zuckerberg's dog", posted a Twitter user. "[C]an we just talk about mark zuckerberg's dog for a goddamn second", tweeted another user.