They had to dismiss him because he insisted on herding all the other dogs.
I totally believe this because we play dodge dog on our stairs many times every day. And when my live-in handyman is around, Wrangler wants to herd us to the same level. If one of us is down and the other up, Wrangler hangs on the stairs for as long as he can stand it. Then he does everything in his power to move us to one level or the other.
What does your pet do?