DN and Snow are both around a year old. Both are white. Snow is one month older, and correspondingly a little bit bigger than DN, though not by much. They are best buds, currently, but their personalities could not be more different. Snow is confident, but laid-back. DN is out to take on the world. His favorite pastime, aside from eating -- any serious alpaca stud needs a good strong appetite -- is tearing ass around the paddock at full speed, jumping, and kicking. He appears to be practicing for the all-alpaca display of the Airs Above the Ground. He does a very nice capriole in particular.
Whenever they wrestle, DN is invariably the instigator. Snow usually complies, but he's always kind of half-assing it. In this picture, DN is the one on the left. He's got his whole body into it -- you can't even see his head, because he's biting Snow's legs (a stud will bite his rival's legs to try and get his rival to drop to the ground). Snow is hoping that he can get away with just kind of do a yoga stretch and be done with it.
By the way, if you're wondering why DN and Snow look so completely different, it is because they are not only from two extremely different bloodlines -- DN has a more typey head, with a very short muzzle, something that I find appealing and plan to breed for -- but because they also have very different haircuts. Snow has a standard cut, with his face fiber shorn off (he previously had gigantic muttonchops) and his topknot -- the poof of fiber on his head -- left pretty much intact. DN has what is termed a bubble cut, where the face fiber is left intact and blended into the topknot. The initial bubble cut came out awful, and I had to play "alpaca barber" and trim that one down quite a bit. Next year, there will be no bubble cuts. Bubble cuts are bad.