Spaying removes a female animal’s ovaries and usually the uterus, while neutering usually means removing a male animal’s testicles.
Spay
Removal of a female’s ovaries and usually the uterus (ovariohysterectomy).
Neuter
Removal of a male’s testicles (castration). “Neuter” can also mean either sex.
Benefits
- Prevents pregnancy.
- Reduces certain cancers and infections.
- Reduces marking and roaming.
When
Usually at 4 to 6 months for cats and dogs, but large dogs are sometimes later.
Recovery
10 to 14 days.
Cost
$50 to $500.
Surgery details and typical costs
Spaying removes the ovaries and usually the uterus, which is an abdominal surgery under general anesthesia. Neutering removes the testicles through a small incision. Spay is therefore more invasive and takes longer, while neuter often has a shorter recovery. Most vets use pain medicine and recommend 10 to 14 days of restricted activity, with an e-collar or recovery suit to prevent licking.
- Costs in the US often range from about 50 to 200 USD at a low-cost clinic and 200 to 600 USD or more at a private practice, with cost rising with size and age.
- Spaying before the first heat greatly reduces mammary tumor risk. In dogs, risk is about 0.5 percent if spayed before the first heat and rises with each cycle.
- Spaying prevents pyometra, a life-threatening uterine infection that affects an estimated quarter of unspayed older female dogs.
Timing and breed considerations
Many shelters spay and neuter at 8 weeks or 2 pounds in kittens and puppies. For large-breed dogs, some research from UC Davis suggests delaying until growth ends may lower the risk of certain joint disorders. Cats are typically fixed around 5 to 6 months. Watch the incision daily for redness, swelling, discharge or opening, and call the vet if it appears.
Procedures
Spaying is removal of a female animal’s ovaries and usually uterus (ovariohysterectomy), and neutering (castration) removes the testicles of a male. Both are done under general anesthesia. Costs range from about 50 to 100 USD at low cost clinics to 300 to 800 USD or more at private veterinary practices, depending on size and region. Recovery typically takes 10 to 14 days with limited activity.
Timing and health effects
The ASPCA notes spaying before the first heat sharply reduces mammary tumor risk and eliminates uterine infection (pyometra). Recommendations for large breed dogs vary, and some research on golden retrievers and other breeds suggests waiting until skeletal maturity may reduce joint disorders. Cats are often fixed at about 4 to 5 months. Fixing prevents unwanted litters: an unspayed female cat can have multiple litters yearly.
Health and behavior effects
Spaying before the first heat reduces the risk of mammary tumors in dogs to about 0.5 percent, compared with about 25 percent in dogs spayed after the second heat. Neutering prevents testicular cancer and reduces prostate problems, roaming and some marking. Studies by UC Davis found that early neutering in some large breeds raises risks of joint disorders and certain cancers, so timing is a conversation with the vet.
Shelter statistics
The ASPCA estimates about 6.3 million companion animals enter US shelters each year, and about 920,000 are euthanized. Spay and neuter programs are credited with the decline from around 2.6 million euthanized in 2011. Low cost clinics, municipal vouchers and shelters often provide the surgery at reduced fees.
Based on data from the ASPCA and UC Davis School of Veterinary Medicine
