This is an age-old question that has been asked hundreds of times. You can do a search on "food", or go to the "Yorkie Health and Diet" threads and you will get all the info you need, AND MORE!
My Dreama eats Solid Gold Wee Bits, and Wosie Innova Puppy. They both get a teaspoon of Innova Evo with the kibble, and also a 1/4 tsp of Missing Link with a sprinkle of Dentatreat. They eat twice a day.