Ovariectomy or "spaying" in cattle is a surgical procedure performed to avoid disease transmission and unwanted pregnancy of animals in areas where females cannot be segregated from males and where extensive grazing conditions prohibit control of estrus through feed additives. When ovariectomy is deemed necessary, the procedure should be performed using appropriate restraint and aseptic technique. Just as for other veterinary medical and surgical procedures, veterinarians should use their medical judgment in deciding the best surgical approach. Research leading to new or improved techniques that reduce or eliminate pain and discomfort associated with ovariectomy and development of viable alternatives to ovariectomy are encouraged. This includes the use of approved or AMDUCA-permissible clinically effective anesthesia and analgesic medications whenever possible.
Welfare Implications of Ovariectomy in Cattle (PDF)