Sorry Mike, but what I have to suggest you may not like...
Don't feed her any Chow at all... Dog Chow and Puppy Chow is the equivelant of McDonald's food for a human baby. There is only fat and perservitives in this food. Although you dog will grow, it isn't really getting the nutrition that it needs to thrive. Try some better foods if you can afford it. The rule of thumb is to look at the first 3 ingrediants of the food, it should have good sources of protein (chicken/chicken meal) and no grains as the top 3. Puppy chow or dog chow's main ingrediant is corn... now think about that, dogs are carivores/omnivories needing very little veggies... why would we feed dogs foods that start with corn, which by the way their stomach does not process very well. Hope this helps.
The most affordable good food I've found is the Costco brand of premium dog food that comes in chicken and lamb varieties. The first two ingrediants are chicken/lamb, then chicken meal/lamb meal... There are a lot better foods out there, just looking at the first page of the food forum will give you a great idea of what they are.
As for your real question, you can feed adult food any time as long as you are feeding a good food.