Lilou isn't your average pig.

She's spreading smiles to harried travelers everywhere as the world's first airport therapy pig. About once a month she heads to San Francisco International Airport to comfort stressed fliers, play with kids and generally make air travel a bit more fun.

Danilova reveals when Lilou will be coming to the airport on social media in advance of the visit. "It's kind of like a lottery," she said. "People get so excited if they're going to be traveling that day."

If you should find yourself at SFO, Lilou usually hangs out in terminal 3 on her volunteer days. "It's because of her hoofs, which we call her high heels," Danilova said. "She prefers the carpeting."