The HOPE Animal Shelter & Sanctuary Resource Center helps you with information about wildlife, pet health and training, animal care, behavioral problems, and other animal welfare groups in Southern Arizona, to name a few. Four million cats and dogs—about one every eight seconds—are put down in U.S. shelters each year. Often these animals are the offspring of cherished family pets. Spay/Neuter and Humane Trap Neuter Return (TNR) are proven ways to reduce pet overpopulation, ensuring that every pet has a family to love them. A solution is possible and starts with each of us taking one small step: getting our own pets fixed. By adopting your next pet from an animal shelter, you are helping to stop pet overpopulation.