I would definitely suggest Natural Balance or Red Barn soft rolls... like Ashley said! ;] (click!)

You can cut them into teeny, tiny pieces, and they smell strong enough to be very high value to almost any dog; but they aren't gross or greasy like a lot of meats. They can also be frozen and they keep for months & months... plus they have pretty good ingredients!

I also recommend investing in a treat bag, (like this). They are soooo useful for training, and you can also use it in Agility. I hate keeping treats in my pocket or in a plastic bag.

Good luck with the classes! I'm sure Lacey will make you proud. C: