Oh, I did forget to add... Everyone here is spayed... I think that is part of the reason we have harmony in the house!
We also don't ever allow anyone to get away with a growl or "the look". I think it has happened twice in a year. Now we are at the point that they can all sit on the couch with their chew sticks and feel safe that no one else is going to take it from them.
Be A Pack Leader!