As part of his personal challenge to eat only the animals he kills, noted nouveau riche person Mark Zuckerberg has been eating a lot of bison burgers, apparently. Thanks to that newly enlightened diet, the Facebook CEO has grown so attached to one bison in particular that he posthumously nicknamed it Billy and mounted the big fella's head on a conference room wall at Facebook HQ. Also: the bison is wearing a Facebook baseball cap.

According to Kara Swisher at AllThingsD, the trophy mounting was a practical joke played on Facebook's COO Sheryl Sandberg while she was away on business. (That makes sense actually, acting like he never left college has been a Zuckerberg signature move. At least until he finally put on a suit for a meeting with the President earlier this year. And practical jokes are basically the zenith of collegiate life.) Although the bajillionaire killing machine hasn't actually confirmed that he himself shot the creature, Swisher reminds us that Zuck tagged a photo of "Bison Burgers" during an onstage presentation at this year's f8 developers conference and that one felled creature can provide enough meat for 7,600 half-pound bison burgers. Somewhere in ">that Palo Alto mansion of his, Zuckerberg has (literally!) a ton of frozen buffalo.

While we here at SFist previously applauded Zuckerberg's conscientious carnivorism, we can't help but worry if the guy is getting a little too attached to his quarry. One day he's hoarding bison meat, the next day you're buying a private island and going full-on Count Zaroff on some shipwrecked Google execs.

Previously: Enlightened Mark Zuckerberg Eating Only What He Kills
[AllThingsD]