Join Date: Dec 2012
Location: Sorry, stalkers, but no.
In New Zealand,
We'd cull fish with messy scales (as these are hard to breed out), deformities, etc etc, unless we were sure for certain that the owner would not be using the fish for breeding purposes.
Some also cull fry if they have too much, or if they are sick, slow etc.
'Culling' essentially is the process of getting rid of an animal that have bad deformities, genes etc that aren't desired, or the fish is extremely sick.
'Killing' implies that it is done in cold blood.
Generally when a breeder 'culls' a fish, it's because they are looking for best interests in their Betta lines, not because they hate them etc.
I know a lot of breeders here in NZ cull fish, especially because of messy scales as it's hard to breed out and wouldn't be too good if it got into New Zealands already limited Betta population.