Male and female kittens can be neutered from around 3 months of age as long as they weigh over 1.5kgs, however, we usually recommend they are done at 5/6 months. There are many advantages to neutering your cat at a young age.
Female cats usually come into season at about 5 months old and can become pregnant. If left unneutered they will start calling for about 1 week in every 2-3 weeks during most of the year to attract male cats.
Spaying will stop all this immediately and will...