Intact male cats are prone to roaming behavior, which makes them susceptible to a variety of hazards, including traffic, fights, cruelty, getting lost or stolen, and diseases from wild or stray animals. One example of infectious disease commonly transmitted among intact male cats is FIV, or feline immunodeficiency virus. This virus is transmitted primarily through bite wounds and, therefore, has a higher incidence among intact males who roam and fight.
Intact male cats are also more likely to urine mark or "spray." After neutering, not only does the marking activity decrease, but the smell of the cat’s urine greatly improves as well.
