Boo, the influencer puppy dies at 12 years old . The Pomeranian was known to his followers as "the most adorable dog in the world ."
According to his owners, Boo died of heart problems , which arose after the death of his canine colleague, Buddy, last year. "Shortly after Buddy died, Boo showed symptoms of heart problems. We believe his heart literally broke after Buddy left," Boo's owners wrote on Facebook.
Since 2012, Boo and Buddy have amassed more than 16 million followers on Facebook and another 600,000 on Instagram . Boo was also the protagonist of his 2011 book, Boo: The Life of the World's Most Lovable Dog .
