They're just so fragile. All three if our hybrids have passed this last winter coming up 3 years old. Pretty sure they were all reproductive tumors and organ failure. With one, we had to deal with acites and the last girl, I chose to put down instead of watching her deteriorate slowly after a week indoors being tube-fed and medicated.Luck isn't in it: you were prepared! Nice!
With my girl, I saw what turned out to be lash material, but it didn't look like it at the time. She was one of my rescue hens, and she'd come from deplorable conditions. I thought it was urates from high temps and dehydration. Now that I know better, I won't let it happen again!
Of course, pets, so no autopsies for them. Gonna stick to quality purebreds from now on. Would rather support rare breeds and heritage operations over live fast die young egg farming.