The world's top body builders are certainly not vegan across the board...for example the actor/competing body builder who plays The Mountain on Game of Thrones consumes almost 2000 grams of animal fat daily[0].

Also no one should emulate top body builder diets unless they plan on working out like top body builders (e.g. 2-3 intensive training sessions a day).

You might be able to find a few vegan body builders but its certainly not the norm.

0: http://www.businessinsider.com/the-mountain-game-of-thrones-...