My grandmother gave my daughter 4 Domineckers on Thanksgiving Day. She had them on Medicated Starter/Grower food, so that is what we have kept them on. They are almost 4 weeks old. My question is should we kept them on the medicated starter food or put them on regular starter/grower food. What age should we switch them if we take them off the medicated? Also, when do we need to start giving them layer food?