How Long Does It Take for Testosterone to Leave a Dog’s System After Neutering? What You Need to Know

logo by Editorial Staff | Updated on September 29th, 2023

Dogs are considered a man’s closest buddy since they can communicate. Dogs, in particular, are particularly lively and loving creatures to humans; as a result, they are typically maintained with humans in their various houses as pets and function as security for those places.

Dogs can also aid with stress reduction. They are typically enjoyable to play with and exercise as pets. For example, if you are agitated, you may find yourself walking or sprinting beside your dog.

fawn pug lying on floor

These therapeutic therapies are supposed to help people cope with stress. As a result, dogs are among the most popular household pets.

Neutering a dog has always been a subject of discussion for pet owners. It’s not just about the surgical procedure; it’s about what follows—the hormonal changes, behavioral shifts, and health implications. If you’re a dog owner contemplating this surgery for your male pup, you’re probably curious about how long it takes for testosterone to leave a dog’s system post-neutering. In this comprehensive guide, we’ll shed light on this often misunderstood aspect of canine care, backed by veterinary insights.

The Impact of Neutering on a Dog’s Life

Owning a dog involves more than just daily walks and belly rubs. It often includes tough decisions like whether or not to neuter your pet. For starters, neutering involves the surgical removal of a male dog’s testicles. This procedure effectively prevents your canine from fathering any puppies. In the immediate aftermath, you may notice that your dog’s energy levels dip significantly, possibly even making him temporarily ill. Thankfully, dogs tend to bounce back quickly.

The Procedure and Its Duration

EventsInformation Regarding The Events
Duration Of Neuter SurgeryFive To Twenty Minutes
Time For Testosterone To Go After NeuteringAt Most, Six Weeks

In general, the neutering process is swift, usually taking anywhere from five to twenty minutes. However, the time it takes for a dog’s testosterone levels to decline varies and can range from six weeks to a year.

Why the Delay in Testosterone Decline?

You may wonder why it takes so long for testosterone levels to normalize. That’s because the hormone doesn’t just disappear right after the surgery. The body stores testosterone and utilizes it as needed. After neutering, your dog’s body ceases to produce new testosterone, but it continues to use its stored hormone. It can take up to six weeks or even a year for the existing hormone levels to deplete fully.

Hormonal Changes After Neutering: What to Expect

Neutering doesn’t instantly nullify hormonal behavior in dogs. It can take two to four weeks, sometimes up to six, for the hormones to fully leave their system. Despite ceasing testosterone production post-surgery, the pituitary gland still sends signals (like LHRH and FSH) to stimulate hormone production, which can cause confusion in the body’s hormonal balance.

Neutering and Behavioral Changes

Neutering your male dog at an age ranging between six to nine months is typically advised, although it can be done as early as eight weeks in some cases. While neutering can help alleviate certain behaviors like territorial marking and aggression, it is not a magic bullet. Training remains essential. In some instances, neutering can exacerbate existing issues like fear aggression, apprehension, or inadequate house training.

Pros and Cons of Neutering

On the upside, neutering helps control the pet population and can ameliorate certain behavioral issues. It also minimizes the risk of testicular cancer and prostate issues. However, like any surgery, it comes with anesthetic risks, albeit minimized by thorough pre-surgical evaluations. Some studies also suggest a correlation between early neutering and certain types of cancer and physical issues.

Assisting Your Dog’s Recovery Post-Neutering

Proper aftercare can accelerate your dog’s recovery. Here’s how:

  • Devote Two Weeks to Care: Allocate at least two weeks for post-surgery care, keeping an eye on the incision and any signs of discomfort.
  • Create a Safe Space: Your dog might experience post-anesthesia drowsiness or even irritability. Having a quiet and isolated area for the first few days can help.
  • Monitor for Complications: Check for signs like swelling or excessive redness around the incision area. If you notice any such symptoms, consult a vet immediately.
  • Avoid Bathing: Resist the urge to bathe your dog in the initial recovery phase as it could risk infection.
  • Control Activity: Limit your dog’s physical activities for at least 14 days, even if they seem fine.


Neutering is not just a surgical procedure but a commitment to your dog’s long-term well-being. While the process might seem daunting, knowing what to expect can alleviate much of the stress. Generally, it takes about six weeks for testosterone to leave your dog’s system, although this can vary. Monitoring your pet’s recovery and consulting your vet for any complications ensures that your furry friend will be back to his cheerful self in no time.


Editorial Staff

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