Male pot-bellied pigs (also known as boars) are usually neutered at a young age to prevent undesirable traits such as odor, aggressiveness, mounting of other pets and people, and urine-marking. A neutered male pig is known as a barrow. We recommend that this is done between 4 and 6 months of age. If an intact boar is already showing these behaviors, he may never lose these traits even once he has been neutered.