I want to raise day old chicks to butcher when they get older for cat food, I've been told cats should eat grain free chicken, is there a grain free diet for chickens homemade or Comercial? I know I can free range them but I mean when they are in the brooder because they will need food. Also I know babys need lots of protien, can I feed metalworms? I breed mealworms for reptiles. Is there anything I can feed along with bugs that is grain free or should I just feed grain food with bugs?