I was over at my friend's kennel yesterday picking up a pup, and took a few pics of his dogs.
He's got two stud males, Boss and Riki. As you can see from the pictures they don't get along, but it was rather funny watching the way they interact. Two angry males with a lot of posturing going on, each claiming his side of the courtyard.
For the record, the kuro-tora Kai 'Boss' is the boss. Riki puts on a big show, but it's rather hilarious watching him shrink around Boss.