Max was neutered at about 8 months. He had already started marking and he did not stop afterwards but it did seem to decrease. The pain your pup will go through is minimal. The first 24 hours he will be somewhat lethargic. He will need to wear a cone for a couple of days. But he will recover completely in a a very short time. As to the personality change Max was a playful fun loving hyper puppy before the surgery and afterwards he was a playful fun loving hyper puppy. Do the responsible thing and have him neutered. Leave the breeding (planned or unplanned) to the experts.
__________________ Max & Sasha's daddy
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