I think this might possibly be one of my favourite Pixar shorts ever...even though it is just an ad.
Now not only is it beautifully animated...the chickens laugh!!! I'm sorry, I can't get passed the laugh. Every time i watch it it makes me laugh. I love how the chicks just all burst out in the same laugh and at the same time.
I think it's because that the chicks movement plus the laugh makes the action so random and unexpected but at the same time....so damn funny.