It's a heartwarming story about a pair of gay penguins who want to become parents. The daring duo stole a baby chick from other birds at a Denmark zoo. The drama unfolds after the chick is left alone. Something smells fishy to zookeepers when they notice a chick is missing.   The baby is returned to its penguin parents and the same sex penguins are given an egg of their own. Same sex unions are rare in the animal kingdom, but when it happens, it's usually among penguins and other birds.