Get

In Your Inbox

Dogster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

How Soon Do I Spay or Neuter a Cavalier King Charles Spaniel? Vet-Approved Info

cavalier king charles spaniel puppy at veterinary

If you’re wondering when to get your new Cavalier King Charles Spaniel puppy spayed or neutered, you’ve probably heard a lot of conflicting opinions. You want to do the right thing for your pet, so what’s the correct answer? While you and your vet should work together to find the right time for your dog, Cavalier King Charles Spaniels can be spayed or neutered around 6 months old.

In this article, we’ll talk about why 6 months is the recommended age for this breed, as well as some other points you and your vet should consider before making your decision. We’ll also offer some thoughts on what to do if you’re considering skipping spaying or neutering altogether.

Dogster_Website dividers_v1_Jan 18 2024-03

Why When You Spay or Neuter Your Cavalier Matters

Traditionally, vets tended to give one blanket answer when asked what age is best for spaying and neutering: 6 months. Later, animal rescues and shelters started performing this surgery on animals as young as 8 weeks to ensure they were out of the breeding pool before adoption.

However, vets and researchers eventually began to take a more individualized approach to their recommendations as they learned more about how the age of spaying and neutering impacted certain breeds differently.

Specifically, early spaying and neutering may increase the risk of joint disease, cancer, and urinary problems in some breeds. It’s thought that sex hormones, which are eliminated by spaying and neutering, play a greater role than previously known in the growth and development of specific body systems, such as the skeleton.

However, the age of spaying and neutering impacts individual breeds differently. Generally, medium-sized dogs, like the Cavalier, show more negative consequences than smaller ones.

A study1 by the University of California-Davis provides recommended ages to spay and neuter 35 breeds based on data collected regarding the specific health outcomes we mentioned. Cavalier King Charles Spaniels were one of the breeds included. Based on this study, 6 months is the suggested age to spay or neuter a Cavalier.

Other Points to Consider

For all female dogs, including Cavaliers, going through even one heat cycle can increase their chances of mammary (breast) cancer. That’s another reason why spaying around 6 months before they go into heat is ideal. Spaying a dog during a heat cycle isn’t recommended.

As a breed, Cavalier King Charles Spaniels are prone to a heart condition called mitral valve disease, which can impact even young dogs. If your Cavalier shows early signs of this disease, such as a heart murmur, it could affect your vet’s recommendation regarding the best age to spay or neuter them. They may also suggest additional health checks first, such as a visit to a heart specialist. If you are concerned about the health and well-being of your pet, seek veterinary advice for the best course of action.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's our online service where you can talk to a vet online and get the advice you need for your dog — all at an affordable price!

PangoVet_Mention-in-Content Savings V1

What If I Don’t Want to Spay or Neuter My Cavalier?

As mentioned, unspayed female dogs are at a significantly higher risk of developing mammary cancer. Older, unspayed females are also prone to developing an often life-threatening infection in their uterus called pyometra.

If you choose not to spay your Cavalier, she’ll likely go into heat about twice yearly. You may notice behavioral changes during this time and have to clean up after her. You’ll also need to be careful to keep her away from unneutered male dogs to avoid an accidental pregnancy.

Unneutered male dogs do not suffer from the same medical issues as females, but prostate problems and testicular tumors can occur as they age. However, unneutered male dogs often display undesirable behaviors, like urine marking or aggression, which are generally improved by neutering. In addition, unneutered males have the instinct to find females in heat, which often leads them to wander into dangerous situations.

If you’re not spaying or neutering your Cavalier because you think you want to breed them, be aware that responsible breeding can be expensive and time-consuming. Cavaliers are prone to several inherited conditions, and the National Cavalier Club recommends several screening tests be performed on any dog considered for breeding.

The recommended tests include:
  • DNA tests
  • Hip and knee X-rays and exam
  • Heart exam
  • Eye exam

Dogster_Website dividers_v1_Jan 18 2024-03

Final Thoughts

In America and other countries with massive populations of feral dogs and cats, the owner’s decision to spay or neuter is often made to be responsible and prevent the dog from becoming part of the problem. As we’ve learned, the best age to spay or neuter a dog is more complicated than it used to be. In addition, any surgery can produce anxiety in pet owners, especially if your Cavalier already has health problems. Don’t hesitate to discuss your concerns and questions with your veterinarian; they can provide recommendations based on the latest research and developments in veterinary medicine.

Related Read: 


Featured Image Credit: hedgehog94, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything dog

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Dogster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

8 Best Deshedding Shampoos for Dogs in 2025: Reviews & Top Picks

Even if you brush your dog every day, it isn’t possible to stop them from shedding altogether. However, there are a few ways...

10 Best Cordless Dog Clippers in 2025: Reviews & Top Picks

Dogs provide us with infinite joy and entertainment, and few animals seem fond of humans. Caring for a lively canine is rewarding but...

What Were Corgis Bred For? History, Folklore & Role

Corgis are easily recognizable by their long bodies, short legs, and charming faces. These adorable dogs may look a little unusual, but they...

Acepromazine for Dogs: Usage, Dosage, Safety & FAQ (Vet Answer)

Tranquilizers have an important role in our veterinary patients. Tranquilizers can make examinations safer and easier, make patients less reactive to stressful events,...

More related

How Much Does a Samoyed Cost? 2025 Price Guide

The Samoyed is a medium-sized purebred dog that was originally bred as a working dog that pulled sleds in Siberia. Everything about the...

10 Surprising Facts About Chihuahuas (Vet-Reviewed)

Don’t let their diminutive size fool you; the Chihuahua boasts one of the boldest personalities. From their bat-like ears to their mysterious origins,...

Why Is My Dog Excessively Barking? 5 Reasons & How to Stop It

Every breed of dog barks—except for the Basenji, which is a hunting dog with its roots in Africa. While barking is common in...

Will a Basset Hound Be Good With My Kids? Facts & FAQ

There’s so much to consider before bringing a dog home. For instance, do you have the space, time, and resources to care for...

Keep reading

Benefits of Goat’s Milk for Dogs: 5 Incredible Health Perks

Every proud dog owner knows the key to a healthy and happy pup is a balanced and nutritious diet. One lesser-known but great dietary option for your furry friend is goat’s milk. Goat’s milk is incredibly nutritious for dogs and...

Goat's milk

How Much Food to Feed a Lab: Feeding Guide & Nutritional Tips

Wouldn’t you love to feed your Labrador dog the best, high-quality food in the exact quantities it needs to thrive? Every dog owner wants this more than anything, yet they can never figure it out. We don’t blame them! Thousands...

labrador retriever eating dog food

How Much Food Should My Havanese Eat Per Day? Vet Reviewed Guidance

A lot goes into feeding a dog, so if you’re stumped on how much to feed your Havanese, you’re not alone. The truth is, there is no set answer on how much to feed your Havanese. Each dog requires a...

Havanese dog eating

WholeHearted Dog Food Review 2025: Pros, Cons & Our Verdict

WholeHearted is a line of dog foods owned and operated by Petco, one of the largest pet retailers in the United States. A healthy food that appeals to a wide audience, it’s a fairly new brand that continues to expand...

Dogster_WholeHearted Dog Food Review

Can Dogs Eat Pine Nuts? Vet-Verified Nutrition Facts & Considerations

There are many pieces of misinformation floating around the web on what is and is not safe for your canine companions. One of these very topics might have to do with pine nuts. Are pine nuts toxic to dogs? No,...

Dogster-Can-Dogs-Eat-Pine Nuts

Can Dogs Eat Gummy Worms? Vet-Verified Nutrition Facts & Alternatives

We take our dogs with us wherever we go, spoil them on holidays, and consider them part of our family. So, it makes sense if you’d like to share your favorite activities and snacks with them, too. But what if...

Dogster-Can-Dogs-Eat-Gummy Worms

How to Properly Store Dog Food: 14 Vet-Approved Tips

Proper storage for dog food is vital for maintaining its flavor and nutritional value. Like human food, improperly stored dog food can go stale and invite bacteria, mold, insects, and rodents. However, many people could use a bit of help...

ready to eat dog food in a container box

9 Best High-Fiber Dog Foods in 2025 – Reviews & Top Picks

While dogs are often thought of as being mostly meat eaters, fiber also plays an important role in maintaining the good health of our canine companions, especially their digestive system. Dietary fiber is part of edible plants that can’t be...

Schnauzer puppy dog eating tasty dry food from bowl