Have you considered using a set of gates instead of the crate? I know people who have had success doing that with multi dog families.
We have had two major fights with our boys, but we were able to see the cause of each (overstimulation), and we were there to separate them before any major damage occurred. I still have trouble if they start to wrestle and im alone with them, as i get nervous. We keep high value toys away, they eat in their kennels, and aren’t left alone unattended. We are hoping we have stopped any additional issues since our boys are only 2 years old, so we have lots of time left.
Good luck with your decision, I know it’s tough.
