What is your favorite animal movie of all time ?

One of the most interesting movies thhat has animals in it is "Life of Pi". Although this is not a movies about someone's beloved pet, or a heroical dog, like most movies are; it is a great movie for someone who loves animals.
the animals in thismove are a combination of real anumals and computer generated ones; and they have done such an awesome job with the computerized animals that it is hard to be sure which ones are real and which ones are not real.
Not only the story is great, but the setting and backgrounds are beautiful as well. Overall, it is just a movie that is well worth watching, and one that you will want to see more than once.

http://youtu.be/mZEZ35Fhvuc