I agree HEchicken that having a mother brood chicks is the best way. It is unfortunate that I can't do that with the number of chicks I produce. I occasionally let one or another raise her own chicks but they have to be separated or the other chickens will pick the chicks to death. Time, space and the ability to provide food and water to a bunch of different areas are my limitations. I have tried to introduce some same age chicks to a broody mama but she has ended up killing them. They seem to know which ones are theirs. I guess what works for one can't work for another. I do know that broody hens lead their chicks to feed and water so they don't need the light to attract them. Nature always has the best method. I guess in the absence of that I have to go by the closest method I can devise.