The male dog’s reproductive tract includes two testicles, housed within the scrotum, and the prostate gland, which lies just behind the urinary bladder. Dogs that will not be used for breeding should be castrated (surgical removal of the hormone producing testicles) to prevent pet overpopulation and unwanted behaviors (e.g.: inter-dog aggression, roaming to find a mate). Castration greatly decreases the chances of your dog developing prostatic enlargement and infections; it eliminates testicular disease. Neutering your dog will not change their loving personality; it will make them less prone to illness. A castrated dog will focus more on your family rather than finding a mate.