Hamster food is available in many pet stores. There are also many other foods that you can feed a hamster, including, fruits, veggies, and many types of seeds and nuts. Always keep fresh water, too....
Some things that are good for hamsters to eat are: sunflower seeds, fruits ( no citrus fruits) lab blocks, and pressed cheerios. You could buy hamster food packs at the pet store.
You feed her the normal food plus a pinch of uncooked oatmeal in her food and give her a very small serving of warm milk a 1 piece of fruit everyday. Oh yeah and give her more protein than usual....