Oddball
I just finished watching this movie.
If you like true stories about animals, you'll love it. I'm a sucker for them!
It's a true story about an eccentric chicken farmer who, with the help of his granddaughter, trains his mischievous dog Oddball (a Maremma) to protect a wild penguin sanctuary from fox attacks and in the process tries to reunite his family and save their seaside town.
This link tells you more about the penguins and the dogs.
http://www.warrnamboolpenguins.com.au/index.php