A vasectomy also removes a male animal’s ability to reproduce. This procedure removes part of the vas deferens, the cord that carries sperm from the testicles to the outside of the body and the testicles remain in the scrotum. As the male sex organs are left to function, your dog will still have his or her hormones. Benefits of a vasectomy include lower incidences of many cancers and many hormone-related health conditions, less fearfulness and noise phobias and less aggression towards people and animals. Conversely, as with traditional neuter these animals are at higher risk of developing certain cancers and prostate conditions. Due to the retained hormones, you may see ongoing sexual behaviours, marking and competition for females in heat. Learn more about Neuter vs Vasectomy here.