Neutering profoundly affects cat welfare through preventing unwanted litters, reducing disease risk and modifying behaviour.
Neutering prevents welfare harms across multiple dimensions. Unowned or stray cats produced by unneutered cats face significant welfare risks from exposure, disease and starvation. Intact female cats experience repeated pregnancies and the welfare demands of raising multiple litters annually. Intact male cats roam extensively, fight frequently and suffer high rates of road mortality and fight wounds. The welfare case for neutering is among the strongest in companion animal practice, preventing individual welfare harms while contributing to population welfare through reduced unwanted animal numbers.