How civilized! I can't imagine getting Lela or Binti to do that.
You would be surprised! I taught him "pick it up" with clicker training. It's a very useful generic command. You add the names of things as you go. Getting him to bring the item to me was a natural progression, starting with insisting he give it to me to "earn" his reward. Increasing distance gradually leads to a very good retrieve! Perry works best just before his supper time. He knows when he gets it right, dinner will be served. Motivation! π