Sometimes, man's best friend is a goose, a seal - or even a bear! Meet Maria, a goose that warms the heart of Dominic, an aging retiree in a Los Angeles park, whose friendship eventually earns celebrity status. And a young boy in South Africa surprisingly befriends one of Africa's most dangerous animal duos: a buffalo and her calf. Finally, Nat Geo WILD's Casey Anderson proves that best friends can come in any shape or size - including a 900-lb. grizzly bear named Brutus!