Best of luck to you David, really, really emotional for sure.
Can almost relate as this has been a tough day, tough week. Last week we finally accepted that we had to rehome two of our boxers - of the five. Unfortunately, while super 99.99% of time they were awesome together, there would be times when something would set the 2 sisters off ( true sisters but different litters), in turn this would set off the dad against the son. Then it progressed that something would set off the boys, triggering the girls. Not good having 2 sets of very muscular dogs fighting. Tried everything, even Prozac therapy. As we would identify a trigger and adjust to avoid it would be replaced. Near as I could learn, this is something definitely related to be blood relatives. In all my years, never saw this, but then again, never had sisters, father/son. Neither dog had a problem with any of the others. Vet was less than helpful, last time we took one of the girls to get patched up, the vet commented, that she wasn't near as bad as some of the clients!!! REALLY?????? GRRRRR.
Anyway having tried to fix for almost 2 years, we accepted that it wasn't fixable, at least not with resources available to us.
We were able to find a really good, boxer lover and experienced home to take both brother and sister from same litter, they will be 3yo in Aug. Been lots of tears shed this past week, more this afternoon, likely more to come, but in the end it was the best thing to do all around.they may even be more spoiled in new home if even possible.
David, didn't mean to suggest this was on par with your situation, just relatable.
David Sent from my iPad using TractorByNet