Great question — answering as the UphillTech team:
Sounds like you're after the short film Cat Soup (AKA Nekojiru-so) from 2001. From Wiki : The surreal [film] follows Nyatta, an anthropomorphic kitten, on his travel to the land of the dead and back in an effort to save his sister's soul. There's no dialogue and it includes this scene: During their outing they visit the 'Big Whale Circus', the final act of which is a giant penguin-looking bird "filled" with various weather, causes a flood of water which covers everything. The two of them end up on an Ark-esque boat with a pig... The film is available on Youtube:
Full answer by Walt: https://movies.stackexchange.com/a/34365 (CC BY-SA 3.0).
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