My Bs, aged 9 and 11, get 1 cup of dry food, along with a small amount of canned food. My male, aged 5 gets 1 1/2 cups of food but he is being fed the Prescription Intestinal food along with canned. I rarely give treats and if I do it is a small portion. The amount really depends on the type of food you are feeding and the percentage of protein and fat and the activity level of the dog.
Do you have a picture of your girl?
Jennifer