Tabula
The Kennel Club is supposed to promote good health not just give out pedigree certificates so the price of puppies can be put up.
There is no test at present for cryptorchidism. The only way to know about it is when male dogs show it.
The Kennel club does now have more about health checks on their site including an inbreeding percentage calculator to try to stop inbreeding the intention of which is to try to prevent hereditary conditions.
I have now reported to them that a stud dog they have on their list must be a carrier for cryptorchidism. I expected them to say they could let the stud owner know, and the other offspring's owners know. I expected that all the stud's registered progeny might have a warning next to their names on the pedigree data base.
Instead they are trying to shirk the issue by saying there is no clarity about the fact that it is hereditary.
Back yard breeder
I went to the breeder I did because their dog was a family pet with children, and I wanted a puppy that would be a family pet used to children.They were not a back yard breeder as such, just breeding from their bitch once before getting her spayed. My dog does have an exceptionally good temperament and is beautiful physically apart from the cryptorchidism.
Checking I can see that the owner of the bitch should have checked all the progeny of the stud by telephoning the owners of all the stud's puppies - going back a few generations. That would not have been easy for him and he may not have even thought of it. A much easier way would be if the Kennel Club took this health condition seriously and build up information of dogs presenting with the condition.
Yes, Cheerful I personally should have checked all the previous puppies of the stud. First though I would have needed the owner to cooperate and give me the contacts of something like thirty people and I would have needed to get in touch one by one. And what if any had been missed? That is why it would be easier if the Kennel Club helped take responsibility.
Other breeding Organisations abroad
Here are quotes from the handbook of breeding rules for the Federation Cynologique International and then VDH in Germany. I think I would expect the Kennel CLub to be more like these organisations.
FCI
Dogs with eliminating faults such as e.g. unsound temperament, congenital deafness or blindness, hare-lip, cleft palate, substantial dental defects or jaw anomalies, PRA, epilepsy, cryptorchidism, monorchidism, albinism, improper coat colours or diagnosed severe hip dysplasia may not be bred.
• With regard to surfacing hereditary defects, e.g. HD or PRA, the FCI member countries and contract partners are obliged to record affected animals, combat these defects in a methodical manner, continuously record their development and report to the FCI on this matter when requested. If a DNA test is performed, the identification (chip or tattoo) of the dog must be checked and certified by the veterinarian who collects the sample as is the case with any health protocol; the test result certificate from the laboratory must include the dog’s identification.
VDA (using google translate)
Erbgesund a pedigree dog is when he inherited standard features, breed type and breed typical nature, but no substantial hereditary defects which could impair the functional health of its descendants.
For breeding not admitted are especially dogs who zuchtausschließende error, eg kind of weak, congenital deafness or blindness, harelip, Splitmouth, significant tooth error and jaw anomalies, PRA, epilepsy, cryptorchidism, Monorchidism albinism, wrong color, evidence of significant hip - dysplasia and when determined by the breed dog breed clubs, other HD - grade, skeletal malformations, etc.
The £400 price
The price for pure bred but not pedigree dogs in the breed I have would be a half of the price I paid. So it is as if the only difference would come from the Kennel Club pedigree certificate. There is no DNA testing though for that.
No doubt even more expensive regular breeders, including those overbreeding from some Kennel Club registered pedigree bitch, may well have been using the same stud dog. So even if I were ever paying more in the future as you suggest Tabula I would need to try to check lots of other progeny on both the sire and dam's side if possible first.
Anyway, maybe this will help warn other people to do just that.