The problem I see is that they fight when they get excited? so it seems to be some form of transferred aggression? I would be betting they are trying to sort out their hiaracy and its not been resolved, BUT the problem is they are all female, and this IMO throws a whole new light on the matter, whats the saying Males fight for breeding rights, female fight for breathing rights, I do feel females will hold grudges. I have two girls here that the youngest started to push her luck, the older girl wasnt giving up her place and so the battle commenced, we have had a few set twos, and eventually I had had enough, so I seperate with a baby gate, they can lie next to each other with the baby gate inbetween, and not bother, but if I move that gate, after a few seconds they will have a go at each other, I am not giving up either girl, so we have worked around the situation, they just dont like each other, I think its possible unless you can seperate then a behaviourist may be needed, I would also have betsy tested for any thyroid disfunctions, as this can induce agression too.

Mo