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How Long After Neutering Dog is Testosterone Gone

How Long After Neutering Dog is Testosterone Gone

It can take 6-8 weeks for hormones to settle after neutering. So, you will not notice an immediate difference in your dog’s behavior. However, if you see a sudden increase in aggression, it is due to the temporary imbalance of hormones. This imbalance is caused by removing the testicles.

6-8 weeks until hormone is gone

What Is Neutering

Neutering is a procedure that removes the testicles from a male dog. The testicles are responsible for male hormones known as testosterone. Your dog will go under general anesthesia and will be cut open by a surgeon.

How Is The Neutering Procedure Performed?

  1. Canine prep (anesthesia, hooking a patient up)
  2. Shaving the patient
  3. Bladder expression
  4. Additional anesthesia into each testicle
  5. Clean Site
  6. Surgical Removal of the testicles by a doctor

How Does Neutering Affect Testosterone?

As soon as the vet has removed it, the testicle’s testosterone production stops. As a result, your dog will have a temporary imbalance of hormones. This imbalance can cause a spike in aggressive behaviors.

There is an imbalance of hormones after neutering which can cause aggression

11 Body Functions Testosterone Effects

Many people want to know how long after a dog is neutered is testosterone gone. The reason they want to know this is because there are 11 body functions that testosterone regulates. As a result you may see changes in your dog in the following categories. 

Testosterone is responsible for hyperactivity in dogs. The reduction in this hormone is why neutered dogs will calm down.

Once testosterone production stops, your dog’s drive to reproduce will stop. Therefore, humping caused by sexual desire will go away. If your dog is still humping, it is due to other causes. For example, neutered dogs will wander less because they are no longer searching for a mate. Less wandering means they will be less likely to escape a fenced yard or bolt out the door. The lack of wandering is one of the reasons neutered dogs live longer than intact dogs. In addition, these dogs are less likely to get hit by cars.

Testosterone raises your dog’s metabolic rate. A lower metabolic rate means a neutered dog will need to consume fewer calories if they are not to gain weight.

Behavior issues such as aggression and sexual humping are affected by testosterone levels. However, there are many reasons dogs are aggressive or hump. Therefore, it only eliminates one cause for these behaviors.

In 2013, Terbug and Van Honk’s study showed that testosterone is linked to self-confidence.

Bone density is linked to testosterone which is why bigger dogs are at risk for bone diseases. In addition, therefore females are more likely to get osteoporosis than males.

A study at Concordia University showed that testosterone controls where fat is stored.

Testosterone helps your muscle cells maintain the strength and integrity of your muscle fibers. As a result, some athletes take testosterone to enhance their performance. Sport performance dogs do not get neutered until later in life. 

While this is the case for human testosterone, there is little research done on it for canines. One study suggests that alopecia (lack of hair) in dogs is caused by their inability to convert testosterone to DHT. 

The testicles not only produce testosterone but are the only source of sperm production.

Separation anxiety is linked to fear. Testosterone provides a dog with more self-confidence. Separation anxiety is more prevalent in female dogs.

5 Functions Testosterone Does Not Effect?

However there are many misconceptions about testosterone. Therefore, when asking how long after neutering dog is testosterones gone, you need to consider there are functions that while are regulated by the hormone might have other causes. 

An enthusiastic, playful, and fun dog will not change his behavior after neutering. A neutered dog does not change personality in this way. This is especially when the neutering occurs at an early age. Neutering at an early age prevents personality changes due to sex drive.

Not all dogs become calm after neutering. Hyperactivity can be hormonally based but also based on breed type. A border collie will calm down compared to other intact border collies. A border collie will not magically become a lazy basset hound.

As stated earlier, testosterone is only one reason for behavior issues. Some dogs are genetically prone to be more fearful. Fearful behavior is what causes fear-based aggression. For example, Shelties are highly fearful. 

Most behavior issues are behaviors the dog learned from its environment. For example, dogs learn to pull, bark, and lunge toward other dogs because it is rewarding. Therefore, behavior training is the only way to curve these behavior issues.

Erections can occur even if you neuter your dog. An erection is caused by an increase in blood pressure, not testosterone. A rise in blood pressure can be due to overexcitement.

Reasons why you should wait to neuter your dog

Why You Should Neuter Your Dog

  • Expanded lifespan by 13 Percent
  • Reduction in the desire to roam or wander off in search of a mate
  • Reduction of risk of testicular cancers
  • Reduces stray population
  • Social Stigma (people assume your dog is aggressive)

Source: Humane Society

What You Should Consider When Deciding To Neuter Your Dog

Another reason people ask how long after neutering is testosterone gone is because you are deciding when to neuter your intact dog. ​

The ASPC says you can fix a dog as young as eight weeks old. Puberty often occurs when a dog is between 6 and 9 months. According to the Humane Society Of The United States, neutering before puberty prevents the undesirable from showing its ugly face.

According to the American Humane Association, neutering your dog young might stop aggression from making an appearance altogether.

Dogs weighing ninety pounds or more are at risk for certain orthopedic conditions when neutered under six months. This is because of the impact testosterone has on bone density.

Dogs that participate in agility, herding, and flyball should wait until the dog is one to two years of age. Testosterone has an active role in maturation. Dogs fixed before development are physical disadvantage compared to other dogs that waited. Testosterone strengthens ligaments and bone growth. It also supports cardiovascular health (Perusquía & Stallone, 2010).

While it is true that testosterone depletion can cause a decrease in metabolism, you can control weight gain with exercise and diet.

Dogs who are timid and show fear-based aggression may spike fear-based aggression. Owners should address this behavior with a trainer as soon as possible. If possible, address it before you have your neutered and then after. The sooner you address the fear-based aggression, the more effective the training is. The more a dog rehearses the behavior, the harder it will be to extinguish it.

Neutering does not solve everything. There are many reasons your dog might be hyperactive

FAQ For: How Long After Neutering Dog is Testosterone Gone​

This last section addresses common questions that usually accompany “How Long After Neutering Dog is Testosterone Gone”

  • $35-$250 for neutering
  • $300-$2,000 for cancer treatment
  • $500-$2,000 for behavior training
  • $1,000-$10,000 for injury bill caused by aggression
  • Less likely to hump other dogs and inanimate objects
  • Marking behaviors tend to be reduced.
  • The dogs wander less and stay near their owners.
  • Aggression diminishes
  • Reduction in activity levels
  • Increase in appetite
  • Reduction in excessive barking or yowling behaviors caused by mating patterns. 
  • Review the vet’s notes
  • Expect your dog to cry, whine, and whimper.
  • Do not walk your dog.
  • Watch for vomiting, extreme lethargy, and signs of internal bleeding.
  • Expect your dog not to eat or drink as usual.
  • Provide a small meal
  • Notice shaking, drooling, or hiding behavior.
  • Keep an eye out for excessive bleeding near the incision site.
  • Check the gums to make sure they are pink and refill with blood when touched.
  • Call the E.R. vet if you have any doubts.
  • Provide your dog a quiet place to recover away from other animals
  • Cancel all night plans
  • Let them sleep. Try not to wake them up too much. 
  • Get a cone
  • Prevent your dog from running or jumping for two weeks
  • Avoid bathing your pet
  • Check incision daily
  • Do not walk your dog

Occurs 10-14 days after surgery

  • Check for a foul smell.
  • Check to make sure the incision is not open.
  • Swelling of incision is expected during the first few days.
  • Redness around the area is expected during the first few days.
  • Two-three days
  • Boys recover quicker than girls.
  • Larger dogs have longer recovery times.
  • Dogs three-six years may take up to 4 days to recover.
  • Dogs over six years can take up to a week.

Lymphatic massage is used to help dogs recover from surgery. This type of massage helps circulate lymph to the lymph nodes. If you can, try to schedule a massage before and after the massage. However, neutering redness and swelling resolves in 2-3 days. Vets recommend lymphatic massage for complex surgery. However, getting one for this minor surgery would not hurt your dog.

  • Get a cone and keep it on. 
  • Keep an eye out if you remove the cone for any reason (i.e., eating or walking)
  • Watch for dogs that rub the incision using objects (i.e., couches, tables, walls)
  • Upgrade your cone to a padded cone

Typically, you can remove the cone after 10-14 days. This period is when the post-op occurs. Your vet will advise you to keep it on if necessary.

No. Dogs become aggressive after neutering for two reasons. The first is there is a temporary imbalance of the hormones. The second reason is that anesthesia makes a dog vulnerable. Therefore, they are more likely to become defensive.

Yes. Have you ever wondered why dogs react poorly to intact dogs? They understand the world around them using their nose. They can smell hormones, including testosterone levels included.

2 thoughts on “How Long After Neutering Dog is Testosterone Gone”

  1. I am trying to find out if any testosterone remains in dogs body after castration. Will the pituitary gland still produce any at all and what can be done if a dog suffers any health problems due to lack. Are there any supplements, either herbal or medical that will help. I was undecided about the procedure but went ahead with my cockapoo, one year old

  2. After neutering, the levels of testosterone in a dog’s bloodstream will begin to decrease immediately. However, the time it takes for testosterone levels to reach a point where they are no longer having an effect on the dog’s behavior and physiology can vary.

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