Both my dogs weigh 8lbs & Lucky is 1 1/2 & Lucy is almost 11 months. They both have dry food out all day & I feed them Innova. They love it. I give them 1/2 cup each & that's usually all they eat of that a day. They get a few doggie treats a day too & usually a little people food, which is whatever my daughter throws down from her highchair! haha!
I don't know if this would help any but what if you gave her food that the pieces were bigger so she would have to slow down to eat it. Like I said...not sure if that would work, but you could try it!
