Spaying, or ovariohysterectomy, is a frequent surgical treatment that sterilizes female cats and dogs. This surgical procedure stops an animal's ability to reproduce by removing its ovaries and, in most cases, uterus.  In addition to reducing the overall number of pets in the population, spaying has several positive effects on... Spaying, or ovariohysterectomy, is a frequent surgical treatment that sterilizes female cats and dogs. This surgical procedure stops an animal's ability to reproduce by removing its ovaries and, in most cases, uterus.  In addition to reducing the overall number of pets in the population, spaying has several positive effects on...