My two pups have never even as much as raised a hair to one another but my friend has two male Malamute litter mates that are 2 or 3 years old and they will tear into each other like there's no tomorrow, but will cry and not eat if you seperate them. They each are over 110lbs, pulling the back legs is the only thing that works for them.
I hope your girls snap put of it and calm down!
No more fights girls!!!!