I was talking with two people that train LGDs and they said at this point my only choice is to separate them forever or re-home one. They both said that I should have allowed them to fight it out the first time and that that would have been the end of it. Of course I could throw them back together and let them duke it out but I have no doubt that that would end in death for one of them. They said that separating them as I have as actually made it worse and made them frustrated. A long time ago I had three female dogs, two were spayed. These dogs never fought, they appeared to be best of friends. We went away for the weekend and left the dogs in a run, it was 10x20 so a pretty good size for three dogs, and we had done it before. We came home to a dead dog. It would take a stronger person than me to put Alondra and Mia together to let them "fight it out".
Probably a silly question - but would it work to muzzle them and then let them "fight?" The muzzles would stop any actual wounds, but the stronger dog could still end up putting the other on the ground? Just throwing it out there....no idea if it's a good idea or not, lol.
I'm just so sorry that you have to make that tough decision.