Have you taken her to the vet for a full check up? She should have gone once a month for shots depending on what you go with? Is she eating the food once you place it down? Is it twice a day at that amount or total?
I don't want to get into the whole raw vs kibble but you might want to at least start adding some raw marrow soup bone that you can get at any supermarket for like five dollars for six. Consider changing your food and look into raw also, or a mix. Doesn't seem like she is getting her nutrition for growth.
Did you adopt her, breeder? How is her energy?