I just thought of something. You can get samples of dry food from some of the pet supply stores. You may want to try that. Or you can ask for samples online from some of the good quality dry food suppliers. You might want to look at the "Health & Diet" section on this forum to see some of the recommended foods to see which one's you may be interested in.
One thing to keep in mind is that some foods contain things that she could be allergic to, such as corn, wheat, and other grains.
Another thing is that mine won't eat anything in a big kibble. It has to be a small kibble. She eats Dick Van Patton's Natural Balance Ultra Premium Small Bites and lately I've been mixing in some Blue Buffalo Chicken formula. It is very small bites, too. They are both good quality foods, though not considered premium quality. She can be finicky with some of those.
Good luck to you!