Smudge! I love your question about balancing the diet with the treats. You must have read my mind! I was thinking the exact same thing!
I have a 19 week old (how old is your?). My girl weighs 13lbs. The vet said she is perfect weight and ht. to keep up what I am doing.
She is pretty active. We have been in 3 obedience classes. She gets alot of treats. She gets good stuff (chicken, liver, cheese. hot dogs). When we go to class I cut back on her meal before the class. When we go for a walk or if we are training and she gets alot I might cut back on the meal afterwards. She gets about 1\2 cup 2x's a day.