In both male and female cats (toms and queens) there are numerous health benefits from neutering.

In tom cats, neutering can prevent aggressive behaviour such as fighting and spraying in the house, and stops the cat straying from home in order to seek out a mate. It can also help prevent FIV infection. In addition the neutering of a male cat can help prevent conditions such as some forms of cancer from developing, namely those which affect the reproductive organs.

In queens, spaying has similar effects to neutering a tom cat. There will be no unwanted pregnancies and the cat will be at much lower risk of developing potentially fatal issues such as a womb infection. Furthermore, since the cat will not be going into season she will not go seeking a mate or calling for one (howling).