Thanks! Cackle it is for me then. We talked it over around here and concluded we probably aren't going to renew the flock until our Black Star dies of old age - or at least for another year or two. She's had enough changes around here, especially since her best friend was euthanized because of cancer last year, this was after her other remaining original flock mate had to be rehomed because the sick bird was being starved by the tumor and she took to eating all of the feathers off the other original flock mate.
Had we known what was wrong, we would have euthanized her earlier and kept the other flock mate; but when we first took her to the vet he suspected parasites, not a malignancy. Unfortunately, it wasn't until the other flockmate had been rehomed that we realized that the disease was a malignancy, not parasites.
If you order hatchery chicks there's always the possibility to some deaths in shipment. Not always but it CAN happen just because chicks are so delicate and die even if they aren't being shipped. So be prepared for that - it's not the hatchery's fault. This is one of many reasons I try to find breeders that ship juveniles rather than chicks but it's harder to find those.
Feather picking - we had a mean Marans that asserted her sneaky dominance by roosting every night right next to a little Silkie and chewing off the little bird's crest bald and then started chewing the little walnut comb. We thought the poor Silkie was moulting - thank goodness her crest re-grew but her comb was forever damaged. Later the Marans claw-attacked another Silkie pullet and we got the Marans rehomed to a friend's layer flock immediately. Her new owner says she's still unpleasant but she's in a dual purpose flock and can't pick on small birds now.
How old is your Black Star now? It's sad you had to go through all those old bird changes - it happens to all of us eventually.
If I lose a bird I'm going to contact CalPoly Agricultural to see if they will necropsy a bird for me. I think they use the donated carcasses for their classes and you get a free or nominal-fee report of the findings in return. Hope they still do it when I need them!