
Hi again,
I see where you are coming from , just when you said " you would register it", I thought best to point out as it is one of the frequent questions on the board " How to register my puppy".
Well good luck in your search and effort , one good thing hopefully that will come from the post is again reinteration again of how important it is to get all this sorted before buying the puppy. No offense ment but as others and I have said it is not a straight forward thing.
It will be easy if you have the pedigree names of the dogs to contact the KC and ask but I think it may be a bit more trying even if it is possible to get the puppys fathers breeder to register the father, then the puppys fathers would need to sign the stud form then the litter would need to be registered whether one puppy or them all. Not a straight forward thing.
What I will say that it is very uncommon for good breeders to use unregistered stud dogs, a dog is generally not registered for a reason whether because the breeder didn't want the dog to be used at stud and it was sold for pet purpose only or more common, that the dog could not be registered anyway.
Sorry to sound so negative but best to be honest with you.
Have you asked the breeder why the puppies were not registered anyway? why if the stud dog is not KC reg they used it? At the end of the day one the sale has been completed there is limited choice of actions.
Good luck anyway and hope the puppy is fine
BFN Pam