I just got 4 one week old chicks today. The feed store I got them from said they do not need heat lamps at this age that it is warm enough for them. I live in Jacksonville, FLorida and our temps are in the upper 80's right now but I am keeping them inside my house away from predators. I have them in a bathroom with the a/c vent closed. My question is should I keep a lamp on them at this age or not? Thanks in advance for any suggestions or advice.