Castrating a male is equally important as spaying a female to prevent unwanted pregnancies. Furthermore, entire male cats have a strong tendency to roam, to be aggressive to other males, to fight and to mark their territory by spraying urine (often indoors!).Click to see full answer. Considering this, what are the benefits of neutering a male cat? 5 Benefits of Neutering Your Male Cat Help reduce the overpopulation of cats. Reduce unwanted behaviors such as inter-cat aggression between house mates. Reduce roaming in male cats. Reduce the risk of testicular and prostate cancer. Reduce the urge for your male cat to spray urine to mark territory. Likewise, when Should male cats be neutered? In order to prevent unwanted pregnancies, it’s recommended that cats are neutered at around four months old, after they have completed their primary vaccinations. Some vets still recommend spaying at five or six months and it’s quite safe to neuter older cats. Beside above, do male cats change after being neutered? However, neutering does not eliminate scent-marking completely, since this is a behaviour controlled not only by sexual hormones but by the level of stress of the animal. Although neutering produces some changes in the behavioural aspects of cats, it does not change their personality.Do indoor male cats need to be neutered?The central benefit to having your kitten neutered is that it increases life expectancy. However, it can also calm their behavior, which can be beneficial if your kitten is an indoor cat. It reduces the likelihood of having unwanted litters, which can be difficult to manage and send on to a good home.