[Britster]

I would just lessen her food a little bit. My 15lb'er eats 1/4 cup in the AM and 1/4 cup in PM of Acana Grasslands and he is at a healthy 15lbs and does not need to lose weight. He's also super active, agility once a week, dog park twice a week (where he typically will run for nearly 2 hours straight), my dads house along with his fenced in yard and 2 dogs twice a week where he runs ALOT, he gets a bike ride once a week where he runs alongside my bicycle, or I am on rollerblades. He also swam a few times a week all summer long. Just to give an example of how active he is and how little he eats... he can eat up to 3/4 cup per day some days, it all depends on his activity level. But if I were you, I would just lessen the feeding by a little bit.