You should get the treats / reward for good behavior thing goin now ... so you can get a head start on obedience training.
I personally have preferred small milk-bone treats. Every dog is different but most like lots of treats! Natural or home made is really popular right now. I'd maybe post in the diet forum for some more seasoned advice.
Nutrical is a great sugar & nutrient supplement that can be given on a regular schedule or just when your baby plays a lot. Since they're so tiny, they can get hypoglycemic (low blood sugar) very easily. It sets in quick and can be dangerous. So giving a little pinky of nutrical is good just for precaution.
http://www.millpledge.com/preparations/nutrical.htm http://www.yorkietalk.com/forums/sho...d.php?t=109194