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Odds and Ends
Old habits die hard
13 9, 1:08am
Reading the Lundehund page on wikipedia in a couple of different languages, I pieced together that it had already gone extent from everywhere except one village by 1900, which IMO implies it was already somewhat inbred by then. Then it "was nearly extinct around WWII" with "only a few individuals remaining" (due to a disease affecting all dogs in the area), but I didn't spot a precise number for that. And then in 1963, the disease struck again, with *only 6 dogs surviving, 5 of them from the same mother*. So at least that bottleneck was worse than the post-WWII 8 the Leonbergers had, if not also worse than the previous one, because nearly all of them were already so closely related. Besides 5 of them being half-siblings, I assume at least some of those were full siblings, which would mean the whole population all descended from fewer than 6 individuals if you look at the parents of the 5. Admittedly it may only have been that bad once, not twice as for the Leonbergers, but again, the Lundehunds had already had two successively tighter bottlenecks prior to 1963 as well.
P.S. You kind of missed the fact that the 50 was at the start of WWII, not the actual bottleneck caused by WWII.