A. Pros: Neutering may decrease bad behaviors like aggression and roaming, decrease/eliminate chances of certain cancers, and help eliminate the chances of an accidental litter.
Cons: It may not completely eliminate sex related behaviors, especially the longer you wait, and you won't be able to breed him.
On the other hand, I would only breed him if you plan on thoroughly researching the breed and investing in proper veterinary care. Breeding, when done right, is not a lucrative hobby.
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