I have been feeding my chicks unmedicated chick starter. We are going to grab more feed tomorrow and I am wondering if I could start medicated now? Will it mess with their system? I was thinking if you buy a chick a week or couple weeks old and started it on medicated then they may not of had it previous. Our feed store was out of medicated so that is why I started with unmedicated. They were suppose to get a shipment in today. Any help is appreciated.