Battle of the Rams!

It is just awesome seeing Rams fight! Raw unbridled power is launched with 400lbs of muscle behind each punch. How do the Rams determine the winner? I am not sure, but I do know it does involve stamina because the same Rams will pound each other for hours each trading victories until one Ram has had enough and just walks away. The Ram on the right had a good run and delivered a great punch, his body is straight and fully extended like a battering Ram (yea, pun intended ;) compared to the Ram on the left.