Watch Nellie, a well-trained sea otter practices a special cup stacking enrichment and demonstrate trained behaviors.
via Amazing Creatures http://amazing-creature.blogspot.com/2012/08/nellie-sea-otter-loves-stacking-cups.html
via Amazing Creatures http://amazing-creature.blogspot.com/2012/08/nellie-sea-otter-loves-stacking-cups.html