i was gonna say that they are trying to establish their pecking order but it sounds like you've had them both for a little while now. Have they always been like this or did this just start up one day? I'm thinking that they can't decided which is Alpha if they are continueing to challenge each other. I"m inclined to say that you will have to pick for them based on their personalities, but if i were you, i'd consult with a behaviorist first. I wouldn't try to handle this one alone.
__________________ Kellie  and  Morgan |