Decisions and agree that euthanasia should ultimately be reserved only for animals that are suffering or are too aggressive to safely place in homes regardless we must ensure that when euthanasia is performed it is as humane as possible direct injection of sodium pentobarbital referred to as euthanasia by. ebook euthanasia guide for animal shelters uploaded by agatha christie decisions and agree that euthanasia should ultimately be reserved only for animals that are suffering or are too aggressive to safely place in homes regardless we must ensure that when euthanasia is performed it is as humane as possible direct injection of. While most shelters around the country practice humane euthanasia by injection of approved drugs some still use the gas chamber a method the hsus and every other major animal welfare group believe belongs in the past the hsus is committed to ensuring that inhumane euthanasia methods like gas chambers become a thing of the past