I have 3 new 9 week old chicks in my flock. They have been with us for a week now. I can not separate my older hens (18-19 weeks) from the food and water easily. When is it OK to take the new chicks off the medicated feed? I have one hen that should be laying any day now so I want to get them off the medicated feed as soon as possible. I have a feeder outside the coop that has the non-medicated feed in it for the older hens but they are still eating from both feeders. Any advice or thoughts would be great thank you.