Surprising fact about Prozac

Puppies and polar bears are on Prozac

While no one knows how many pets are on Prozac, Americans spend an estimated $15 million a year on behavioral medication for their cats and dogs.

In 2007, Eli Lilly, the maker of Prozac, launched Reconcile, a chewable form of its drug, for canine separation anxiety.

Now even zoo animals are on antidepressants, for everything from aggression to obsessive-compulsive disorder.