A large number of these cases are cats that spray or mark walls and other vertical household objects. Adult male cats have an extremely strong urge to mark territory, both indoors and out. Aggression Cats, whether neutered or intact, can get into fights but most inter-cat aggression is seen between intact males. This is a direct result of competition between male cats, and because intact male cats roam and protect a much larger territory. If these fights lead to punctures that penetrate the skin abscesses are a common sequel.
Neutering reduces fighting and abscess development in male cats.
Roaming and Sexual Attraction Intact males have much larger territories and wander over much greater distances than females and neutered males. The urge to roam may be particularly strong during mating season. Neutering greatly reduces sexual interest, but some experienced males may continue to be attracted to, and mate with females. Physical Changes Male urine odor is particularly strong and pungent. Castration leads to a change to a more normal urine odor.