Originally released back in 1973 - "Fantastic Planet" is actually quite an interesting and impressively animated feature-length film from (of all places) Czechoslovakia.
Set far off on a distant world called Ygam - "Fantastic Planet's" story was initially intended to be viewed as a metaphor concerning class struggles. This film's story was apparently based upon the Soviet's occupation of Czechoslovakia back in the late 1960's.
"Fantastic Planet's" world is a world where humans (like any other animal) have been "domesticated" by the giant, blue-skinned Traags who dominate the planet Ygam the very same way that humans dominate things here on Earth.
Based on the novel by SyFy writer, Stefan Wul - "Fantastic Planet" won Grand Prix at the Cannes Film Festival in 1973.