Spay and neuter: what to ask your vet about timing

Veterinary groups in the United States recommend that cats not intended for breeding are spayed or neutered by about five months of age, because many cats can breed from around four months. Some clinics and shelters operate earlier. The right age for your kitten is a decision for you and your vet, who will weigh its health, size and local rules.

A female cat can become pregnant at a very young age, and a male can father kittens soon after. Cats that are not sterilised also tend to roam, fight, yowl and mark. Sterilising prevents unplanned litters and several health problems. Shelters are full of cats, and one unplanned litter becomes many.

What the surgery is

• Spay (female): the vet removes the ovaries and usually the uterus under general anaesthetic. It is an abdominal operation.
• Neuter (male): the vet removes the testicles under anaesthetic. It is a shorter operation, and the cat usually goes home the same day.

Both operations are common, and risks are low in a healthy cat. They are still surgery under anesthesia, and no operation is risk free. Your vet will examine the kitten first and may suggest pre-surgery blood tests, especially for older cats.

When is the right time

Timing varies, and the advice has changed over the years.

• Many veterinary groups now support sterilising kittens before about five months of age. They cite the early start of fertility, which can occur at four to five months in both sexes, and the benefit of fewer unplanned litters.
• Some shelters and clinics sterilise kittens at around eight weeks or when the kitten reaches a minimum weight, so they can be adopted already done. Veterinary groups consider this safe when carried out by experienced teams.
• Some vets prefer to wait until the kitten is a little older, such as five to six months, particularly for a very small kitten or a breed that matures slowly.
• Some cats may be done later, for example a cat taken in as an adult.

Large or slow-maturing breeds, kittens with health problems and kittens that are small for their age may follow a different schedule. Ask your vet what they recommend for your kitten and why.

Law and local programmes affect timing too. Some places require sterilisation before adoption or by a set age, and some offer low-cost clinics or vouchers. Check with your local shelter, council or veterinary association for what applies where you live.

What to ask your vet

Bring a list. Useful questions are:

1. At what age do you advise surgery for this kitten, and why?
2. Does the kitten need any tests first?
3. What anaesthetic and pain relief do you use?
4. Will the kitten stay overnight, and how will you monitor it?
5. What should I do the night before? Many clinics ask you to withhold food for a set time, and the vet will give exact instructions.
6. Can you microchip the kitten while it is anaesthetised, and can we update the vaccines at the same visit?
7. What should I expect during recovery?
8. What is the cost, and what does it cover?
9. What will you do if the kitten is a cryptorchid (one or both testicles are not in the scrotum)?
10. What will you do if a female is already in heat or pregnant?

Do not give your kitten any medicine unless the vet has prescribed it. Human painkillers can be dangerous to cats.

Before the surgery

• Keep a female cat away from entire males as early as possible. She can become pregnant at her first heat.
• Keep the kitten indoors for now.
• Follow the vet's fasting rules exactly, and tell the vet if the kitten has eaten or has a cough, a sneeze or diarrhoea.
• Prepare a quiet, warm, low-sided recovery room.

Recovery

Your vet will give written instructions. In general, expect:

• Sleepiness and wobbliness for the first day.
• Reduced appetite for several hours. Offer small, light meals as the vet advises.
• Limited activity for about a week or two. Prevent jumping and rough play.
• A small incision. Look at it daily. Mild pinkness is common.
• No licking or chewing the wound. Use the cone or suit the vet provides.
• A recheck if the vet requests one.

Keep the litter box close and use a litter that does not stick to the wound if your vet advises it.

When to call a vet after surgery

Call the clinic the same day, or an emergency clinic if the clinic is closed, if you see:

• Refusal to eat or drink after 24 hours.
• Repeated vomiting.
• A wound that is open, bleeding, swollen, hot, oozing or smelly.
• Visible internal tissue at the incision. Cover it with a clean damp cloth and go to a vet at once.
• A very quiet or weak kitten, pale gums or trouble breathing.
• Straining to urinate or no urine for a day.
• Fever, shaking or cold limbs.
• Constant licking at the wound, or removal of the cone.
• For females, a swollen belly that gets larger.

Common mistakes

• Waiting too long. A kitten can be fertile before many owners expect.
• Believing a female should have a litter first. Veterinary groups do not support this.
• Mixing up early and late advice. Some old advice says to wait for a year. Ask your vet for current guidance.
• Letting the kitten run or jump after surgery.
• Removing the cone too early.
• Assuming a neutered male cannot be affected by urinary problems. Neutered male cats can still block, and a blockage is an emergency.
• Overfeeding afterward. Sterilised cats often need fewer calories. Ask your vet.
• Skipping the check for an entire female in heat. A cat in season yowls, rolls and tries to get out.

An unspayed female also has a higher risk of a uterine infection called pyometra later in life, and an increased risk of mammary tumours. These are among the reasons vets support early spaying.

Summary

• Most vets advise sterilising by about five months, and some clinics do it earlier.
• Ask your vet about timing, tests, anaesthesia, pain relief and cost.
• Check local rules and low-cost programmes.
• Follow fasting and recovery instructions exactly.
• Call the clinic if the wound looks wrong or the kitten will not eat.
• Combine microchipping and vaccines where your vet agrees.