It doesn't sound like there is a pack order. Luka and Mandy used to fight but they have finally established a pack order and quit. We haven't had a fight in almost 6 months. Sometimes people reccomend to let them fight unless if they are clearly hurting each other. We didn't let Mandy and Luka fight because Luka is much, much stronger and could have seriously injured Mandy. Mandy did lose two teeth in one fight, even though we stopped it really fast.

I would do the can with pennies over the water bottle. To break up a fight without getting hurt grab one of the dogs' back legs and pull them up into the air.

As I'm typing Mandy is growling at Nova for trying to step over her, but there is no fighting because Mandy is top dog and the other three know it.