Spaying is a general term used to describe the ovariohysterectomy of a female animal. Neutering is a general term used to describe the castration of a male animal. However, neutering used in reference to both genders. 

What are some of the health and behavioral benefits?

Through neutering, you can help your dog or cat live a happier, healthier, longer life. Spaying eliminates the constant crying and nervous pacing of a female cat in heat. Spaying a female dog also eliminates the messiness associated with the heat cycle.