If you’re a land owner and animals such as coyotes or wild pigs are driving you hog wild, help may soon be on the way to control their numbers in a humane way — in the form of a birth control pill for animals. The need is apparent: According to the American Humane Society, about 7 million dogs and cats are euthanized each year at animal shelters. One female cat can lead to the production of 420,000 offspring in her lifetime.