I wouldn't lift endorsements for puppies sold as pets
I do not wish to breed but have been reading this debate with interest. Could a refusal to lift endorsements inadvertently have the opposite effect to what you intended?
Endorsements will not stop the determined owner, it just means the pups can't be KC registered.
A hypothetical scenario, owner buys a pup and agrees to endorsements as 'just wants a pet'. Later they would like to breed so asks breeder to lift endorsements. Breeder refuses. Owner still wants pups so decides to go ahead and maybe register with another body.. Thinks of a stud dog and sees no point using health tested KC stud ( doubtful his owner would allow anyway) so uses the obliging spaniel down the road ( he is also free). The resulting pups are advertised in free press and sold at a bargain price (compared to KC reg litters) to unsuspecting owners.
This could be the start of a BYB as they have not had the expense of reputable breeders.
I am not for one moment saying that this is acceptable and always happens, but I do think that endorsements will not stop a determined owner.
I am not 'having a go' at you Jane or any responsible breeders who put endorsements on their pups and when I get my next pup I WILL choose one such breeder.