Andy and Dougy keep the peace most of the time, and they accomplish it by minding what upsets the other brother. You know, Andy hopping on the ottoman Dougy claims, for example.
More subtle, just being in the air space claimed by the other brother requires adjustments.
Minding his own business. Andy loves the recliner arm for a little rest!
Life is good!
Oh no! Dougy’s stopped by the ottoman, and refreshes his marking with vigorous scratching.
Andy moves over to the other arm. He gets to stay on the recliner a bit longer because he isn’t in Dougy’s air space over there!
.Of course, it doesn’t hurt to keep an eye on his brother!
Dougy is comfortable with Andy being where he is.
“What!? What!? What!?”
Dougy hears something only cats can hear, and sits up to try to get a better fix on it. Then he ran off. Andy is safe from Dougy now!