Neutering your pet also has many benefits. The procedure, which prevents male animals from reproducing, can help your dog or cat live a healthier, longer life. Neutering will not change your pet’s personality. You are reducing or eliminating his risk for prostate and testicular cancer, as well as sexually transmitted diseases. It will also reduce or eliminate undesirable and embarrassing behavior, including roaming, fighting, humping, and spraying. Neutering will also help control the dog and cat overpopulation problem, keeping more animals out of shelters.