everyone has their opinion on when to spay and neuter.. a few people believe that it should be done after the animal has reached sexual maturity... there are a few studies that claim they are less prone to certain bone cancers and growth problems if done later.. most believe around 6 months is best.. and some breeders will spay and neuter pet puppies before they go to their new homes... before sexual maturity prevents cancers of mammary and sex organs.
Personally I do like pediatric s/n.. it does assure that the animal wont be bred.. but I also think the owner should do a little research and decide for themselves when they feel the dog should be spayed and neutered.. as long as they are responsible enough to prevent a litter!
If she doesnt agree with what the breeder is telling her, then she should look elsewhere. Some breeders are very picky on what they want done to the pups.. my vet told me that one client had just gotton a Weim puppy, and the health contract is even specific on what type of vaccines, brand of food, etc! Not all dog breeders are this picky.. and I personally think that's insane to tell someone what brand of food to feed! The contract on my Crested was basic.. he was not to be bred, I was to neuter him, and I would recieve his (limited) AKC papers upon proof of neuter.. I also was not to sell him to a petshop, breeder, or broker, or turn him over to a shelter or rescue.. if I couldnt keep him, he was to go back to the breeder. He had a 2 year health guarantee on genetic illness.. there was nothing that voided the contract either! However if I did not uphold my end of the contract, I could be sued for breach of contract.
The golden club is a good resource to get referrals.. http://www.grca.org/