Smokey doesn't really react to being yelled at, he'll still do whatever he was doing.

Reggie reacts some, though he reacts more to noises like clapping which startles him.

With Nebo....he definitely reacts...not to yelling or commotion in general, he doesn't care. He only reacts if the yelling is directed at him, and he knows when it is. Usually all I have to do is yell once, and he runs right to his bed and stays there until I say ok.