The whole point of breeding is to find the next perfect standard puppy to continue the line.
I know a top-end working dog breeder. Over the last several decades, she's bred on average about one litter every two years. She keeps a puppy from about every other litter (she has people queuing up for her dogs). She's never had more than 4 bitches (she doesn't have a stud dog, never has had).
Now they have 6 dogs. Maybe they even decide one of the puppies hasn’t grown to be a good breeding stock.
Does that mean they can’t breed until the original bitches die in 10years?*
Er, no... I know people who have 8 or 10 dogs. Those weren't the people I was talking about. I was thinking more about the large facilities where there are 12 or 15 or more breeding bitches and 2 stud dogs and the breeder is NOT in it for the love of the breed because aside from pedigree cockers and pedigree cavaliers, they're also churning out cockapoos and cavapoos: they can register 3 pedigree litters per bitch with the Kennel Club and look legit, but also take cross-bred litters as well.
Honestly, ArcherDog, it probably feels as if I'm having a go at you, but I'm not. I'm just incredibly frustrated by legislation that manages to give a gloss of acceptability to commercial dog breeding while making life awkward for ordinary hobby breeders who, after risking making a loss (vet fees etc but no live puppies) make a net profit (in normal times) of (say) £2k for eight weeks fairly intensive and sometimes very worrying work.
What would have been wrong with a short training course for say £100, leading to a simple, basic licence, with the council allowed to make a spot check after whelping? Everyone wins: the breeder gets some verification that they're not a puppy farm, puppy buyers get assurance that they're buying from someone genuine with some basic knowledge, some dogs will be better cared than they would have been otherwise, the system would be self-funding, and the tax man gets a cut.