
The link provided should help.
Bear in mind that responsible breeders breed to have something to show or work in any breed, and it is the surplus puppies that go to purely pet homes.
They will therefore be looking for the best stud dog for their girls, and make their choice of dogs that they have seen, and that have been assessed as good specimens of the breed.
So it really is the bitch owners who choose which dogs will be used at stud, and they have the choice fo the top dogs in the country, and will be looking foe the best they can find with a compatible pedigree.
So is your dog doing well at shows or in the working arena. have owners of top class bitches admired him?
If so I assume you are a member of one or more of the breed clubs. These will produce year books, and those who are happy to have their dogs used will usually advertise the fact in their review (advert) pages.
Any breeder who approaches a male dog owner just to use their dog so their bitch can reproduce with no good reason for doing so, no serious research into, and knowledge of the dogs in both pedigrees is to be avoided. This kind of breeder is motivated purely by financial considerations, who will have skimped on the important aspects of breeding (selection for type health and temperament) and will sell to the first suitable or unsuitable person willing to buy, and there end their responsibilities for the puppies produced.
Morally as a stud dog owner as well as the breeder should be responsible to help with re-homing any puppies if the owner no longer can or wants t keep them.