What is a good brand of food that I could feed my chihuahua?

I have five chihuahuas, one is 11 month old female and the other is one year old and three little puppies and they are picky eaters, I give them purina Little Bites for indoor pets but I don't know if is just for puppies and if it has all the nutritions for a dog because my 11 month old chihuahua just had three puppies and I want to give her a food that is good for her. Can you please recommend me a food that is god for them.