He did give me a little attitude about the Come command today and I had to boost his correction a little to get him to come in from the yard. We will focus on this tomorrow to make sure he understands how to get the right answer (though I have a feeling he is just being pesky when he ignores this particular command. After all, he has things to do.)
All in all, he is doing great and is, as always, a very polite house guest.