As many dog and cat owners can attest, neutered male animals often live longer than their intact counterparts. (scientificamerican.com)
Not being neutered and remaining on a chain are tied to aggression and territorial behavior in male animals. (okcpetsmagazine.com)
For male animals neutering is usually performed between the ages of 8 weeks and 6 months; however, it can be performed on older animals as well. (caninejournal.com)