Maybe something is not clicking in her head. Perhaps, she can't differenciate between scent?

So, you're saying you put her on a CC then approach a planted quail, she doesn't smell it but bumps it then chase. Every other time, you let her free to chase black birds around the yard.

Have you shot over her yet? It seems to me she is enjoying the chase and not thinking about 'hunting'. How many times you've taken her hunting?

My dog I'll let her chase squirrels, rabbits, etc. She'll also creep on robins, tail down, stalking. I don't mind; she enjoys it. But get a pheasant hiding in a bush in front, she'll hold firm, tail high. That only comes with bird exposure and actually getting out there.