Ok we bought our 6 mystery chicks today at TSC, I bought a small bag of medicated chick starter for them. I got to wondering and called TSC to see if they are vaccinated chicks or not, and they girl got kinda snotty telling me that I SHOULD of duramycin blah blah blah, I told her that I had them on medicated Manna feed and she said oh well then they will be fine... I am SOOO freaking confused! Am I doing ok? Or should I have them duramycin? Is the medicated food what they need or should they be on normal starter?