I do think they are both alpha males, but the older one doesn't try to get away from the younger one at all! It's the youngster (Kimba) who needs a place to get away from Mac (the geezer). Luckily, a neighbor in my building was moving and gave me a 5 ft. tall cat tree she was going to throw out. Kimba is often on the very top tier or in the bottom cubby hiding from Mac. Mac knows no age limits. He's about 15, has hyperthyroid, and still runs, jumps, plays, etc... with the best of the youngsters. His meds have really made a difference in how he acts. Kimba is sweet, but at times naughty, 2yo who loves nothing better sometimes than to annoy Mac. I'm glad that all of yours are so mellow. Sometimes I envy you for all the beautiful, handsome, furbabies you have.