Breeders for the most part are not dedicated hunters, they are "breeders". If you have 5-10 dogs there is no way you are getting that many dogs out in a given year to know what you have. Unless you hunt every day, which they don't. They are in it to sell dogs, and thats it.
That's a really big assumption that well far fetched at best.
Most of the sporting dog breeders (pointers, don't know shit about swamp collies and labs) run the piss out of their dogs all year long. Breeders need titles to sell dogs, the only way to get titles is to run them.