Big Buck Bunny (2008)

In the thick and undisturbed forest, sparkling spring has finally arrived, and all creatures, big or small, enjoy life. However, Big Buck Bunny--an enormous, fluffy, and utterly adorable rabbit--is facing a crisis: the ruthless, loud, bullying gang of a flying squirrel is heartlessly harassing him, determined to squash his happiness. Now, this means war. But who will win?