How to stop guinea pig barbering?

I really do not think there is a way to stop it, as it is a dominance issue them, the hair eater is showing she is the boss of the hair cut getter! I know when my Miya was barbering Suzzi I ended up having to separate them as there were other issues as will such as Miya would not allow Suzzi to eat in her cage so I had to remove Suzzi so she could grow back her wonder fur and eat properly.Miya is a guinea pig that simply does not like another guinea pig in her cage, she likes to be alone, On the other hand Suzzi is not happy alone so I had to get her a cage companion. It is really about really knowing your guinea pig as they are all different, just like us. Good Luck