Are Male Dogs That Haven't Been Neutered More Aggressive?

Neutering or castrating male dogs presents a variety of benefits. A castrated dog is generally healthier because it has no risk of developing testicular cancer and a reduced risk of other reproductive disorders. One of the main reasons cited for castration is that it helps reduce the population of feral and unwanted dogs which usually find their way into shelters. Castration can also impact a male dog's general behavior.

  1. Aggression

    • The male hormone testosterone is responsible for much of a male dog's aggressive behavior. When the testicles are removed during castration, the levels of testosterone and a variety of other male hormones in the dog's body are greatly reduced. This moderated hormone balance promotes much more docile behavior, especially toward other male dogs and strange people.

    Other Behavior

    • Apart from curbing aggression, castration can also help reduce other undesirable behaviors. Castrated dogs are less prone to roaming than those left intact, because they do not feel the extreme urge to search for a mate. A castrated dog's adjusted hormone balance also promotes greater focus when around other dogs, because the dog will be less concerned with their pheromones.

    Health Benefits

    • Apart from removing any concern about testicular cancer, castration also carries several other health benefits. A dog is much less likely to develop perianal tumors if castrated between seven and eight months of age. They are also less likely to develop dangerous hernias when castrated.

    Risks

    • Like any surgery, castration poses some health concerns. There is always a small chance your dog could be negatively effected by anesthesia. Incisions and sutures both present a risk of infection if not kept clean. A dog castrated while it's too young may also have its growth hormone production disrupted, resulting in a slightly distorted body shape.