In females a neuter is called a ‘spay’, in males it is called ‘castration’. A spay is removal of the ovaries and the uterus, a castration is removal of the testicles.   Recent studies show that neutered dogs live longer, are less prone to developing certain types of cancers, and are less likely to develop infections directly related to the reproductive tract, such as pyometra in females – which can be fatal.   We recommend neutering from 6 months of age onwards (later in large breeds).   One of our team of vets or nurses will advise you on the best plan for neutering or spaying your pet.