Neutering your pet

Neutering or desexing is generally performed at 6 months of age.  Cats reach puberty about this age and neutering males will reduce the amount of wandering they do (wandering cats can get hit by vehicles) and also reduce the number of fights that they get into.   Female cats can get pregnant around this age, so don't delay desexing otherwise you may find you have unwanted kittens.

For dogs, males can be castrated at 6 months of age, and females can be spayed at this age as well before their first season.

For female dogs, desexing before they have their first season greatly reduces the risk of them developing mammary (breast) cancer later in life.  This can be a very serious cancer.   Also, by removing the uterus there is no chance of them developing a pyometra (infection in the womb), which is another serious disease common in older dogs that have not been desexed.

Desexed animals have slower metabolisms and so are prone to putting on weight, make sure you keep your neutered animals exercised and monitor their weight so that they do not get overweight.    It is likely that you will have to adjust the amount that you feed once your pet is neutered to keep them at a healthy weight.