I would start using the treats .... bullys respond to ANYTHING if it involves food!!!!
HOWEVER, these are the treats that we use .... frozen green beans, frozen blueberries, baby carrots, cucumber chunks, banana slices, apple slices, and in the summer I'm going to try freezing canned pumpkin (not pumpkin pie filling!!!) in ice cube trays so I can use them too.
So you'll get great results because you're using treats/bribing them .. ..... and yet the treats will all be healthy and really good for them, therefore Molly will have a cute little waistline!!