New Data Shows Increase in Number of Pets Killed in U.S. Shelters for the First Time in 5 Years 2 years ago Related News Canine cancers as models: We have barely... Pedigree uses AI to transform shelter dogs... Canine cancers as models: We have barely... How Petting Can Help Shelter Dogs Cope... Psychiatric Service Dogs | What They Do... The data collected by Best Friends shows pets killed by the U.S. shelter system increased from 347,000 to 355,000 in 2021.