Aggression is natural to the breed. You learned the hard way, that breaking up a dog fight can lead to serious injury. Never again try to break up a dog fight with your hands or body. Cali can turn aggressive when the dogs territorial instincts are triggered. Cali, could turn on a Human child with out any warning because of this instinct.

As said above, only one dog in your house hold should be allowed. Going by the intensity and violence of the attacks, and the amount of blood every where, Cali has become a dangerous dog. Try keeping Nala, but observe her carefully, and only have her as a pet, and no others. You need not to invite another, possibly more horrible incident, that could involve the Police, death, or severe injury to a child.