Having your female cat spayed helps reduce the risk of various cancers, even removing the risk of your cat getting some of them. If your cat isn’t spayed, she could get pregnant and have kittens and you may also find she makes an unpleasant calling sound throughout the night while she is in season. Once your cat is spayed, she is unlikely to wander as far, and that helps make sure you don’t lose her.
After your male cat has had ‘the snip’, he is less likely to spray strongly-smelling urine to mark his territory or wander far from home in search of females. He is also likely to be much less aggressive, which means fewer fights and injuries.