Human 1, Kitties 0
They travel together. They go off to the bedroom - under the bed, I think. And stay and then come out, together. They aren't in lock step. Mars is right here in my lap and Joy is off down the hall. If I turn on the laser, they will both chase that dot but otherwise, they do their own thing. Then, in a bit, together, they will go back to the bedroom. It's like they have a pact.