She is most likely trying to establish the dominance of the pack, some dogs act stupid and go overboard.
You need to dominate her often. Let em all know you are the dominant pack leader, and that particvular dog needs it alot more often than the others. Somebody has to be top dog, and if they are just pups they are looking for a leader and trying to make their own decisions. My decision would be to "be the leader" and take all the guess work out for the pups. Establish this in your pack, and if the dog challenges you then you know the dog has serious issues.
X2, I will not put up with any fighting on my yard, box, woods anywhere. Im the leader of the pack and you have to let the dogs know that. You have to establish dominance over all the dogs or there will be problems eventually. I go as far as holding a dog down on the ground and biting their ear til they whine, if they snap back or growl its time to cull ruthlessly right on the spot. Thats just me and how its been done in my family for decades and it works.
Ben, I think i would try to bite you too if you were trying to hold me down and bite my ear!! lol
LOL it will only happen 1 time Trent, Id hate to cull you