Spaying and neutering companion cats provides individual health and welfare benefits beyond population control that make it the recommended standard of care in most welfare contexts.
Cat spay-neuter is a welfare procedure that provides both individual and population-level benefits. Individual welfare benefits are substantial: elimination of pyometra risk, significant reduction in mammary cancer risk, reduced fighting injuries, and lower roaming mortality for males. Population benefits include reduced unwanted litter welfare problems and reduced contribution to feral cat populations. The anaesthetic and surgical risk of the procedure is real but well below the lifetime welfare risk of not being sterilised in a companion cat context. Opposition to early neutering has focused on potential health effects at prepubescent timing, leading to recommendations for post-maturity neutering in some guidelines.