When you say culling, do you mean spay/neuter and put in a pet home? Not using incorrect colors for breeding purposes?
Why you all continually speculate that this goes on every day in reputable breeders homes is just beyond me, I am assuming to further your point

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I do know of a breeder that got a chocolate, she S/N both parents and the puppy. Do you consider that culling?
It is
wrong to accuse reputable breeders of doing something to gain a sympathy vote, yet I see the same argument every time. It ALWAYS comes up. AGAIN, nobody is saying you should not LOVE a chocolate, what the "Supporters of the Standard" are saying is you should not BREED one! Geez... that is kind of catchy...maybe I will start a new club