Sometimes referred to as neutering or spaying, desexing is the surgical removal of a dog's sexual organs under general anaesthetic. In female dogs, the ovaries and part or all of the uterus are removed, and for male dogs, it's the testicles. It is usually performed when a dog is between six and nine months old, but your vet can offer you the best advice for your dog. Although the idea of major surgery can seem daunting, desexing has behavioural, health and welfare benefits.