Hi all, I have 10 4week old bantam chicks and right now I feed them Manna Pro Medicated started crumbles. The only place I can find this is through My Pet Chicken in 5 lb bags and the shipping is more than the bag of food. Plus the fact that they are eating more and more now I have to really plan to always have food available but not too much that it goes bad. My local Agway has their brand medicated starter "Mash" chick food and I was wondering if I could switch the brands. And are crumbles the same as mash, and if not does that matter too? I don't know if it'll will upset their systems or not. And will buying a 50lb bag only be good for a certain amount of time before it goes bad or loses nutrients? Thanks as always!