Neutering can extend a dog's life and reduce or even eliminate the risk of contracting cancer or other diseases. Moreover, after sterilization, the dog will not run around during the estrus period, and the dog's whereabouts can be better controlled. In addition, the dog's temper will become gentler and his mood will become more stable. The owner will not have to worry about having no one to raise his cubs, which will reduce the number of stray dogs. If the dog at home mates with a stray female dog, the child will be born. The cubs born will become stray dogs again.