
Unless the Vet is a dog judge, and a Cocker one specifically then he will be no use other than to tell you if your bitch is healthy!
Breeding carries a freat many responsibilities, to your bitch, her puppies, their owners, and the breed!
It is like marriage, not to be entered into inadvisedly.
As you have plenty of time, and your breeder would seem not to be an expert, I would suggest that you Join your local breed club. attend shows and other events run by them, and get to know reponsible breeders of good standing.
After this they may be able to advise you if your girl is of a quality to offer something to the breed. If she was a result of a one off litter, depending onhow compatible her parents were, then she may or may not be a good example of her breed based on theStandard!
This doesn't reduce her value to you as a pet. If it turns out that she is not of a quality to breed from, there is nothing to stop you purchasing a well bred bitch puppy, show her, and with the help of her breeder and her Sires owner, and other friends you make in the breed, why you should not go on to breed yourself, if you still have the wish after you see what is involved.
Remember you will have a lifetime responsibility to the puppies you breed, and may have to rehome them at any age if circumstances in their homes change!