Pros and Cons of Neutering a Dog

Zack Keithy, our author, is a certified veterinarian technician (UC Blue Ash) for over 6 years (contact him here). The articles written here are based on his expertise and experience, combined with a review by our expert vet reviewers including Dr M. Tarantino. Learn more about us here.

Got a pup and wondering whether neutering is the right choice?

It’s a big call to make, and deciding what’s best can feel overwhelming.

I’m sure you’ve heard the debate.

On one side, neutering helps prevent unexpected litters and can address certain behavioral issues.

On the other, it might alter your dog’s natural instincts and even come with some health considerations.

So, how do you know what’s right?

In this post, we’ll break down all the pros and cons of neutering a dog, and I hope it gives you all the info you need to make the best choice for your furry friend.

What Actually Happens When You Neuter a Dog?

Neutering, in this case, means surgically removing a male dog’s testicles, which stops sperm production and halts hormone production from these glands.

Some people refer to this procedure as castration for male dogs, though that term can sound a bit harsh!

A vet performs the surgery, and while it’s often recommended to be done as early as 8 weeks old, studies suggest that timing can vary (we’ll get into that in a bit).

After the procedure, your pup will get some pain relief and can head home to rest and start recovering soon after.

During the healing process, your pup needs to take it easy for about a week to ten days, which means no roughhousing or intense activities to allow for proper healing.

Neutering will result in your dog being unable to reproduce, and they’ll also experience lower testosterone levels, which could affect their behavior and physical health.

Why Are Dogs Neutered?

When people hear about neutering, it’s common to wonder—why put a dog through that?

It might sound like torture at first, but understanding the reasons can shed a different light on the practice.

First off, neutering helps prevent dog overpopulation.

When there are more dogs than homes, many end up in shelters, on the streets, or worse, face euthanasia due to lack of resources.

Then, there’s the impact on behavior.

Neutered dogs are often less aggressive and easier to train since lower testosterone levels mean less territorial or dominant behavior.

And finally, neutering can also reduce the risk of health issues.

Spayed females have a lower chance of developing breast cancer, while neutered males are at a lower risk for testicular cancer.

Do Dogs Really Calm Down After Neutering?

It’s often assumed that neutering will mellow a dog out and make them less lively.

But that’s actually a myth worth debunking.

Neutering doesn’t alter a dog’s personality or temperament.

What it does do is lower testosterone levels, which can help curb specific behaviors like mounting, humping, marking, and roaming.

It’s worth noting that neutering won’t necessarily make your pup less energetic, and results vary from dog to dog.

So, rest assured—big personality shifts are rare, and you’re unlikely to see major changes in your pup after neutering.

The Benefits of Neutering a Dog

Some might see neutering as a bad thing, but let’s look at the bigger picture.

If breeding isn’t on your agenda, neutering is one of the most responsible choices you can make as a dog parent—and it comes with some solid benefits, especially for your dog’s health.

Here’s what neutering can do:

• Boosts lifespan
• Reduces the risk of testicular and prostate cancer
• Lowers the chance of urinary tract infections
• Reduces territorial behaviors like marking and fighting with other dogs
• Decreases the likelihood of aggressive behavior
• Completely eliminates the chance of unwanted pregnancies

Studies show that neutered dogs live longer, with life expectancy increasing by 13.8% for males and 26.3% for females on average.

Neutering can also positively impact behavior, as neutered dogs are less likely to roam and show aggression toward other males when seeking a mate.

The procedure also helps reduce the chances of territorial fights and injuries linked to mating, plus it lowers exposure to contagious diseases spread during mating season, like canine herpes.

Another bonus is the reduction in marking behaviors, which can save your floors from unexpected indoor accidents.

Research shows that neutered dogs tend to be less aggressive and are less likely to bite or display behaviors like humping.

And of course, neutering completely removes the chance of unwanted pregnancies.

These health and behavior perks make neutering a responsible, beneficial choice for any dog owner.

Disadvantages of Neutering a Dog

Before making the final call, it’s important to consider some potential downsides of neutering your dog.

Here’s a quick summary:

• Increased risk of joint issues
• Behavior changes aren’t guaranteed
• Possible changes in coat texture
• Permanent loss of breeding potential

First, there’s a higher chance of joint problems after neutering.

Research published in Frontiers found that neutering dogs weighing over 20 kg before one year of age is linked with an increased risk of joint disorders, including hip dysplasia, elbow dysplasia, and cranial cruciate ligament injuries.

For large breeds, timing matters—neutering before a year can increase these risks.

Also, while many hope for positive behavior changes, it’s not a guarantee.

In some cases, neutering might even lead to temporary aggression.

However, with proper training or support from a professional, these behaviors can be managed effectively.

Additionally, some owners notice coat changes after neutering due to hormonal shifts.

Though rare, coats can sometimes grow fluffier, especially in breeds like the Cocker Spaniel.

So, when it comes to neutering your dog, it’s a decision that deserves some serious thought.

Once it’s done, there’s no going back—your pup’s ability to breed is permanently gone.

For those with purebred dogs, the choice to neuter is especially important.

If you’re hoping to preserve your dog’s lineage, weighing the pros and cons carefully is essential before making a final call.

What’s the Best Age to Neuter a Dog?

If there’s one takeaway from this post, it’s this: there’s a lot of mixed information online about the ideal age for neutering.

Lots of people suggest the 6-month to 1-year range, but studies have shown it’s not a one-size-fits-all answer and depends on the breed.

I highly recommend you check out the study and see if your dog breed is listed in there.

If not, you should speak to a vet and ask in depth questions like their experience with your breed.

The procedure itself takes around 30 minutes, and with proper care, your dog will be comfortable and pain-free moving forward.

Again, I must emphasize, finding a vet experienced in neutering is key to ensuring your dog receives the best care possible.

Recommendations from friends and reviews online should help you out here.

What Are the Risks of Neutering Your Dog?

While neutering is a routine procedure with generally low risks, it’s still important to be aware of the potential risks involved.

Here’s what to keep in mind:

• There’s a chance of post-operative complications like infection, bleeding, or other surgery-related issues, though these are usually minor and manageable with medication.
• Anesthesia use, while safe, carries slight risks, including potential allergic reactions, respiratory complications, and in extremely rare cases, death.
• Hormonal changes can affect bone and joint development, which may increase the risk of orthopedic issues like hip dysplasia or cruciate ligament injuries.

I know this might sound a bit concerning, but remember, these risks are uncommon—especially since this is such a standard procedure for vets.

Care and Recovery After Neutering Your Dog

Here’s a quick guide to what you can expect after your dog’s neutering.

Most dogs take about two weeks to fully recover, although some might need a little extra time.

During this time, just keep a closer eye on your dog and let your vet know if you notice any unusual symptoms.

After surgery, your dog will need plenty of fluids and rest.

You may see some unusual behavior, like them sitting more, trying to jump, or, for females, attempting to scratch their incision area.

Your vet will likely provide pain relief medication, and you’ll want to avoid letting your dog jump or engage in rough play until they’re fully healed.

Please also get your dog an e-collar to prevent it from licking or biting at the surgical incision site.

Just want to make sure you’re prepared!

So, Should You Neuter Your Dog?

If breeding your dog is part of your plan, then neutering obviously isn’t an option. But for everyone else, the decision rests in your hands as the dog’s owner.

People have strong, and often differing, views on this topic, and there are valid arguments on both sides.

You need to weigh your options carefully, keeping your dog’s best interests at heart.

Take the time to do as much research as you need, and try to set emotions aside while making this choice.

In Summary: Weighing the Pros and Cons of Neutering a Dog

Choosing whether or not to neuter your dog can feel challenging, but once you’ve made the decision, it’s important to stay confident in it.

Before moving forward, evaluate the pros and cons to be sure this choice aligns with what’s best for your dog.

If you’ve decided that neutering is the way to go, take steps to fully prepare yourself and your pup.

Get informed about any potential risks, and be ready to provide comfort and care as your dog recovers.