Spaying or neutering your pets can greatly reduce their risk of developing many types of cancer later in life. Spaying your animals will also reduce/eliminate the chances of your pets developing a uterine infection called a pyometra which can be a life-threatening condition. It may also decrease or even eliminate unwanted behaviors such as aggression or running off. Spaying or neutering your pets is also the only way to do away with unwanted litters of puppies or kittens without placing an extra burden on animal shelters.