Of the estimated 6 million to 8 million dogs and cats sent to animal shelters every year, half are euthanized and the rest adopted, according to the Humane Society of the United States.

• 美国人道协会称：在每年送到动物庇护所的大约6百万到8百万猫狗之中，有一半被执行了安乐死，其余的被领养。