I put two of my males - Gambit and Khaoz together on the floor to see them "battle". I've never seen this type of BP behavior, and with my latest little "photo fiasco" of them, pooping on me....I thought I might just see what they'd do if I put them together.....It became clear after even a few minutes that one clearly was the "winner". It was a fascinating thing to see! But now that I saw it, I'll likely not do it again, because even though Gambit was the winner, he was nervous and agitated for the rest of the day.