When I saw this thread I went to get my copy of How To Teach Your Dog To Talk by Captain Haggerty. I found two tricks in the "Tricks for the Multidog Family" chapter that might fit the bill.

*Take Off Blindfold : This is a variation on retrieving exercises. With one dog blindfolded and in the sit-stay position, another dog, on command, pulls the blindfold off the first dog. This blends beautifully into the Balance and Catch blindfold trick.

*Crawl Under : In this trick, one dog is put in the stand position and the second dog is told to crawl underneath the first dog. Obviously Lucky would be the one doing the crawling. I think this one would be super cute!

Also if the title of the book intrigued you, you might be interested to know that Pekes do well vocalizing the letters G, U, and W.

I'd be happy to type out more detailed information (from the book) about how to train your doggie duo to do these tricks, so let me know which, if any, interest you.