I am really sorry to hear about all that. Losing good dogs is a hard blow. I recently lost my big female Pyrenees and that was truly a hard hit. She was one in a million. We got her when she was a year old from a friend who couldn't keep her home. She was a "goat dog" but never would stay with the goats long enough to protect them. We brought her home and she never once offered to kill a chicken the first time. We didn't have to train her, she was just an all around good LGD.My adult turkey have been roosting in the trees, because I didn't have many predator problems for years... and its had too change their ways. Good dog died 2021 and The last couple years GH owls have been picking them off . Took my largest tom late last fall.
Now that I'm hearing that you all lose such large birds to varmints, I am hesitant to put my favorite Sweetgrass jake and jennies in the coop/run. I may have to just turn them out in the goat lot when my husband gets their shelter built and watch them like a hawk. My dog will take care of them, but they aren't out of the woods with blackhead. That is the monster I'm dealing with right now.
We have big owls here too. When they don't take a bird, they tear them all to pieces trying to take them and it's a mess.