After neutering your dog, you can prevent some reproductive diseases, such as prostate diseases. It can also avoid the irritability, pain, fighting, loss of appetite, etc. caused by dogs in estrus. Dogs in estrus may attack people and extend the life of the dog, because excessive reproductive activities will accelerate the aging of body organs and shorten the life of the dog. Dog lifespan. It can also change the dog's personality and prevent them from some bad habits that annoy their owners, such as peeing everywhere, barking, etc.