I hope they're all doing better now, after a few days rest & meds. Actually, they do have a shot now for KC, Sherman and Star both got it. When you get shots, they have to have a second follow-up shot about 3 weeks later. If they do it intra-nasely, it's only done once. I figured mine wouldn't be too keen about the nose thing, so we opted for shots.

A good trainer/behaviorist may be able to help you with the two females fighting. I can tell you my experience - Siberian alpha females are known for fighting with other females, which is why we now have a male companion for Star. She & Rosie, my RB rottie-mix girl, started fighting when Rosie turned about 3. (Star was 7) Star split her scalp open once - what a mess! They got into it several times, always bloody, and Rosie always got the worst of it. I was upset too, but due to Rosie's unfortunate run-in with a truck, (she died), never had to make that tough decision about rehoming one. good luck with your situation, I'm sure with some good training, you can alter the way they interact.