Each year, approximately 1.5 million shelter animals are euthanized (670,000 dogs and 860,000 cats).  The number of dogs and cats euthanized in U.S. shelters annually has declined from approximately 2.6 million in 2011.  https://www.aspca.org/animal-homelessness/shelter-intake-and-surrender/pet-statistics#:~:text=Approximately%206.5%20million%20companion%20animals,approximately%207.2%20million%20in%202011.In the United States, many government-run animal shelters operate in conditions that are far from ideal. In the wake of the financial crisis of 2007–2008, many government shelters ran out of adequate space and financial resources.[9] Shelters unable to raise additional funds to provide for the increased number of incoming animals have no choice but to euthanize them, sometimes within days.[10] In 2012, approximately four million cats and dogs died in U.S. shelters.[11] However in recent years, there has been a dramatic drop in the number of animals euthanized in shelters, due mainly to a successful push to promote spaying and neutering of petshttps://en.wikipedia.org/wiki/Animal_shelter#United_States_and_Canada