

Neutering offers benefits to both you and your beloved companion. Many vets recommend neutering cats early in their life to ensure no unwanted kittens, fewer worries for you, and health benefits for your cat.
The terminology around neutering can be confusing, but to define the language your vet will use:
Spaying is when a female cat has either her ovaries or both her ovaries and uterus removed.
Castration is officially defined as the removal of any sexual organs, but it’s most commonly used to refer to when a male cat has his testicles removed.
The word ‘neutering’ applies to both sexes and means that they are sterilised and unable to produce kittens.
The Benefits of Neutering (Spaying or Castrating)
Prevents Diseases
Spaying your female cat before her first oestrous cycle (coming into “season” or "heat", or being able to breed) greatly reduces the risk of mammary cancers later in life. This is because the levels of hormones such as oestrogen, which encourage the growth of certain cancers, are reduced. Also, the risks of ovarian tumours and uterine infections are much lower.
There are other diseases that can result from natural cat behaviour related to mating. Feline leukaemia (FeLV) and feline AIDS (FIV) are two diseases spread through infected cats biting other cats, according to the Blue Cross (these diseases are different from human AIDS and leukaemia, and cannot be transmitted from cats to people). By reducing your cat's urge to fight over mates and territory, you'll also reduce their chances of contracting these incurable diseases from other cats.
Reduces Fighting
Unneutered male cats are driven by hormones to seek mates and defend their territory against intruders. So two or more unneutered male cats in the same household, or even the same neighbourhood, can lead to fighting, especially if there's a female cat in heat nearby. By neutering your cats, you'll reduce their aggressive instincts and lower the chances of fights breaking out. Not only can this reduce the risk of catching FIV and FeLV, as previously mentioned, but your neutered cat is also much less likely to get injuries and painful abscesses.
Reduces Incidence of Roaming
When a female cat comes into season, both her hormones and instincts are urging her to find a mate. Remember that males are also driven by hormones and mating instincts. Neutering helps to prevent your cats from roaming too far in search of ‘love’ and will reduce their risk of incidents such as car accidents and climbing injuries...
Keeps the Home Cleaner
Male cats spray their urine on vertical surfaces to mark their territory. The pungent odour of an unneutered cat's urine alerts other males that there's another ‘man about the house’ nearby who has claimed the area as his turf, and tells females he's waiting for his opportunity to mate with her. An unneutered male cat in your house can be a messy and very smelly affair. Neutering a cat reduces or eliminates the urge to spray, and if they do, the scent should be much milder.