I don't use medicated feed. I don't use antibiotics in the water. I put probiotic and electrolytes in the water. Probiotic to help keep them "regular" (if you know what I mean) and electrolytes to help them to recover from shipping or hatching. I hatch my own though, so I know that they don't have any diseases. Someone that buys hatchery stock may have some ideas for you.Should I put antibiotic powder in the water for the new chicks? A person who was looking at the chicks when I was at the feedstore buying my chicks on Thursday suggested I add some antibiotic powder to their water for the first week if the feed I had didn't already have it. When I got home I checked that my Feed and Grow was not medicated. I have not gone back to the feed store (Village Mercantile in Corrales) for it yet but just wanted to get people's feelings about using it. How do I know when to use it otherwise? My wife phoned me at work to tell me that one of the chicks seems lethargic and not hanging out with the other 3. When she opened the lid to hold it, it made no effort to escape, the way the other 3 did. Being new to raising chickens, I don't really know what to look for.