The Story Behind the Internet's Most Famous Photo of a Pig Pooping on Its Own Balls

"Piggy poop balls," the internet's most famous and moving photograph of a pig whose own poop is sitting on its shelf-like balls, has appeared in such storied publications as Gawker, Deadspin, and Gawker since it first appeared online in 2011. And now, it finally has a backstory, thanks to Buzzfeed's Katie Notopoulos,…