When you spay and neuter your pets, you give them a better chance at a happy life! They often live longer because they are less likely to run away, get in fights, or get hit by cars. They are less likely to get certain types of cancers. Females are less likely to get pyometras and other deadly diseases. Males are less likely to spray and have other behavioral problems!
Spaying and neutering your pets also helps with the overpopulation of animals. There are way too many animals that are euthanized each year because no one can adopt them.