I have a problem I have never been able to solve. My dogs will sit or do whatever I ask before I let them into the house, but once I open that door, even if I then make them sit again or pause, once they get inside the house, the two take off and play, chasing each other. I can't stop them with any physical move so I end up having to command, which they will respond to but not until after they've done the chasing game for a minute or so. Any ideas?