A dog saving another dog: http://www.youtube.com/watch?v=-HJTG6RRN4E
Christian the Lion: http://www.youtube.com/watch?v=52LhuIhEPUo&feature=related
Koko the Gorilla http://www.youtube.com/watch?v=XqTUG8MPmGg
Relationship between an elephant and a dog: http://www.youtube.com/watch?v=e4OD8dxIry8
Chantek the Orangutan: http://www.youtube.com/watch?v=a6fNps_RUlQ