Actually that photo is not Photoshopped it is real I can tell you that because I do Photoshop for a living. The light conditions, the shadows the tail shows on the back the other shooters leg gives him what he needed for steadiness . Also I did a little research before I opened my big mouth and this is what I found:
http://www.huntandtell.com/2009/06/18/huge-wolf/
So there you have it folks, check the rest of the pictures and be careful you may get eaten by a beast like that!