I recently photographed a great spay and neuter event here in Los Angeles, held by the Coalition for Pets & Public Safety. They have a fantastic mobile clinic that provides free sterilization of pets owned by seniors, handicapped, and low-income residents of LA. They alter more than 5000 pets per year!
Sterilizing dogs and cats is the absolute best way to control overpopulation. So if you long for a day when euthanasia of dogs and cats will end, spaying or neutering your pet is the best thing you can possibly do!