I'm no expert, but from the posts I've read about raising a litter of puppies, it's extremely expensive! Is this guy rich? Because he's going to have to spend so much in vaccinations, vet checks, and FOOD. So much food! I can't imagine feeding more than a few GSD's, let alone a litter of 8-14 growing GSD pups!
It would cost way less to adopt that many adult GSD's, who've already been vetted. Maybe he thinks if they are litter mates there won't be any aggression issues amongst males/females? If that's it, he's wrong. Two brothers are just as likely to rip into each other over a female in heat. Can you imagine several females in heat? Living on the same property, sharing the same males? That's pretty much a disgusting and inhumane version of survivor.
I would start by doing searches for litter-mate aggression or something of the sort. I bet you could find stuff about that. I'm sure someone could argue that pack order would be established and they would grow up with it, but i would imagine you could still have some pretty serious scraps between siblings if there's breeding in the mix. Good luck!
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