Thanks for all of that, listeme! We're working on "leave it" and "drop it" (similar to trade, for now, hoping he'll start dropping without trading eventually). Leave it was more out of necessity, lol, while drop it he seems to find fun.
I am truly convinced that he is a magic puppy today! Came home after having to leave him home alone in the crate for 5 hours (I felt horrible!) and expected to have a huge mess in the crate to clean up. Instead, there was a puddle of pee on the kitchen floor just OUTSIDE of the crate, and nothing inside! Either he was on his hind legs or learned to lift a leg, but either way - awesome!!!