Neutering can decrease or even eliminate socially unacceptable behaviors in dogs.
Mounting, humping, and increased sexual drive: These behaviors are drastically reduced by more than 50%.
These behaviors are reduced because neutering decreases reproductive hormones (testosterone and estrogen) in your dog.
Mounting: This behavior increases with sexual drive and occurs during excitement in many dogs.
This behavior becomes more learned the longer a dog is intact.
Neutering might decrease these behaviors, but completely eliminating them may require behavioral therapy.
It's not just undesirable behaviors that are affected by neutering.
The risk for weight gain also rises—not because of decreased activity, but because of a biological process that occurs after neutering.
Aggression towards other dogs: There are many reasons why dogs display aggression towards other dogs, but sexual hormones play a role in the intensity and duration of these events.
Same-sex aggression is higher in male dogs who are not neutered.
Neutering a male dog before marking behaviors begin eliminates the behavior to almost 2%.
However, if you neuter an older dog who has already begun marking, it might be more difficult or impossible to modify the behavior.
Neutering may occur at different ages based on many different factors, such as breed, age, temperament, and how you acquired your pup.
Talk with your vet about the best time to neuter your dog.