How many animals are murdered at animal shelters in one day the US?

There is no federal data collection on the number of animals euthanized in shelters in the United States. The American Society for the Prevention of Cruelty to Animals (ASPCA) estimates that 1.5 million adoptable animals are euthanized in shelters each year. This number is likely an undercount, as not all shelters report their data to the ASPCA.