Polar bear and husky play (photo credit © courtesy of National Geographic Channel)

Last year, National Geographic Channel aired a program about unlikely animal friends.  Premiering Friday, January 7, 2011 at 9pm EST is a second installment of bizarre animal pairs: Unlikely Animal Friends 2.

The one-hour special takes a look at friendships between a sheep and an elephant, a goat and two dogs,  huskies and polar bears, a leopard and a golden retriever, and a lion, tiger and dog.

Watch a sneak peak here about an orphaned elephant calf befriending a sheep: