The entire or a sizable portion of an animal’s reproductive organ is removed during neutering or spaying. Castration is used only for male animals, whereas spaying is typically used for female animals. Both phrases are frequently referred to as “fixing” in common usage.



The most popular way of sterilizing animals is neutering. Animal rescue organizations, humane societies, and shelters advise pet owners to neuter their animals to reduce the number of unwanted litter that ends up in the rescue system. All adopted cats and dogs must be sterilized before entering new homes in many nations.