Neutering your dog
If you're not planning to breed from your dog, neutering is worth considering. This article explains the procedure and its pros and cons.

The short answer
Neutering is an operation that stops a dog from reproducing. Females are spayed and males are castrated. It can prevent unwanted litters and some serious health problems, such as pyometra in females, and reduce hormone-driven behaviours such as roaming. It won't fix every behaviour problem, and neutered dogs can gain weight more easily. The best age depends on your dog's breed, size and sex, so ask your vet.
Key considerations
- 01Spaying prevents pyometra, a life-threatening womb infection, and unwanted pregnancies.
- 02Neutering can reduce roaming and mounting, but it won't fix every behaviour problem.
- 03Neutered dogs can put on weight more easily, so watch their weight.
- 04The best age depends on your dog's breed, size and sex. Ask your vet.
If you're not planning to breed from your dog, neutering is worth considering. This article explains the procedure and its pros and cons.
What neutering involves
Neutering your pet means surgically preventing them from reproducing. In females it is called spaying, and in males it is called castration.
When a female dog is spayed, the ovaries and usually the womb are removed, so she can no longer become pregnant or come into season.
Castration is the removal of both testicles. This removes the main source of the male hormone testosterone.
Neutering is always done under a general anaesthetic. As with any operation, there are some risks, and your vet will explain them. Your dog will have some discomfort afterwards, so your vet will give you aftercare advice and pain relief.
What age should my dog be neutered?
The best age depends on your dog's breed, size and sex. Ask your vet for advice for your dog.
For female dogs, there are pros and cons to spaying before or after the first season. Your vet can help you weigh these up.
Possible benefits for male dogs
- Prevents testicular cancer and reduces the risk of some prostate problems.
- May make them less likely to roam, which lowers the risk of going missing, getting into fights or being injured.
- May reduce mounting and other hormone-driven behaviours.
Possible benefits for female dogs
- Prevents pyometra, a life-threatening womb infection.
- Prevents unwanted pregnancies. Pregnancy and giving birth carry risks for the mother.
- Reduces the risk of mammary tumours.
- Stops seasons, and the false pregnancies that some females have after a season.
Will neutering change my dog's behaviour?
Some owners worry that neutering will change their dog's personality. Neutering can reduce hormone-driven behaviours such as roaming and mounting, but it won't fix every behaviour problem. Talk to your vet if your dog is anxious or fearful.
Weight after neutering
Neutered dogs can put on weight more easily, so watch their weight and ask your vet about adjusting their food.
Recovery
Follow your vet's aftercare advice. Keep your dog calm, stop them licking the wound, and go to any check-ups. Contact your vet if the wound looks swollen, red or is leaking, or if your dog seems unwell, won't eat or is very quiet.
Only give pain relief that your vet has prescribed for your dog. Never give human painkillers.
Before you decide
- Are you sure you don't want to breed from your dog?
- Have you asked your vet about the best age for your dog?
- Is your dog anxious or fearful? Talk this through with your vet first.
Questions readers ask
Is neutering safe for dogs?
Neutering is a routine operation, but like any surgery under general anaesthetic it carries some risks. Your vet will explain these and how they look after your dog.
Will my dog get fat after neutering?
Neutered dogs can put on weight more easily, so watch their weight and ask your vet about adjusting their food.
When should I neuter my dog?
The best age depends on your dog's breed, size and sex. Ask your vet for advice for your dog.
About this article
- Written by Mypetzilla Editorial Team
- Published
- Updated
This article is general pet advice, not veterinary or legal advice. If your pet is unwell, speak to a vet.
On Mypetzilla
Related advice

Health & welfare
How to treat your pet for fleas
How pets get fleas, the signs to look for, and how to treat your pet and home safely, all year round.
Updated

Health & welfare
Dental disease in dogs
Dental disease is one of the most common health problems vets see in dogs. How it develops, the signs to look for, and how brushing and regular checks help prevent it.
Updated

Health & welfare
What is mange, and how do I know if my dog has it?
The two main types of mange in dogs, sarcoptic and demodectic, how their signs differ, which other mites cause similar problems, and why your vet needs to confirm the cause before treatment.
Updated

Health & welfare
Preventing Separation Anxiety During The Coronavirus Pandemic
Week three of the Coronavirus lock-down is starting to take its toll on pet owners and how to keep their pets entertained and preventing behavioural issues from the sudden change in routine.
Updated