20 odd years ago I did shoot, sell, give away dogs that were not needed, for various reasons, (biters, jackers, divorce etc).
I can see the reason for culling big litters and culling stock that doesn't meet the standards of the owner.
As I've got older and more mature I've realised that there is another way.
Get a missus like mine who would (seriously) divorce and probably castrate me if I did any of the above now
Cheers, D.