When my son bought his cocker spaniel, a few years ago, he recieved his pedigree and the breeder said she would forward the registration documents, as my son only wanted a dog for a pet he didn't bother too much. After a few weeks he telephoned the breeder to see where the docs were and was told the lady had taken ill. I now have a bitch cocker who is registered and i would like to breed them as they have very good temprament, and have good pedigrees, would it be possible for my son to check if these pups were registered, or is it too late now. Also if this is not possible would this make a lot of difference.

Hope someone has some advice.

They may have good pedigrees (what do you mean by good pedigrees?) but the pedigrees may not be good for each other. If you wish to breed your bitch then your first port of call would be your bitches breeder as she may well be able to advise you of a more suitable stud dog.
Using a dog at stud could alter his personaility. He could start urinating in the house and be more cocky towards other male dogs when out. Owning a stud dog is just a great a responsibility as owning a brood bitch.

It is almost certainly too late for your son's Cocker to be registered now if he isn't already - the Kennel Club do allow late registrations but only within 12 months of the birthdate I think. This means that any puppies produced by your bitch would not be able to be registered with the Kennel Club (both parents must be KC reg)You may find it difficult to sell unregistered puppies & would only be able to ask around half the price of a KC Reg pup

I think you need to think very carefully before going ahead with mating your bitch. It's not just a matter of the pedigrees being "good", you have to know whether they are compatible. A number of hereditary problems can crop up in Cocker Spaniels & experienced breeders know the lines they should avoid eg There is a serious hereditary kidney problem called FN which is fairly uncommon but you need to know whether either your bitch or your son's dog have any relatives which have produced this fatal disease in the past. If they have, then you should not risk mating them. You should also ensure that both your bitch & your son's dog have been eye-tested clear for Progressive Retinal Atrophy, a hereditary eye condition that leads to premature blindness. There are a number of eye specialists throughout the country who carry out eye-testing & I'm sure you could find one within reasonable travelling distance. You also have to consider the temperaments of other relatives in the respective pedigrees - your bitch & your son's dog may have excellent temperaments, but if some of their relatives do not, then you may produce puppies with less than perfect temperaments. To be able to decide whether a dog is a suitable mate for a bitch, you need an awful lot of information about the health & temperament of their families generally & it really doesn't sound like you have this knowledge yet. Perhaps you could contact your breeder for further advice, assuming the breeder of your bitch is an experienced, knowledgable person.

Jane