My chicks are now slightly more than 4 weeks old. Their brooder is our guest bath tub. There is a window in the room and it is always open for fresh air and I do have the light on during the day. I also have a heat lamp and now it is quite high so the temp on them is about 70. I have been turning it off during the day this last week as they are mostly feathered now. I still turn it on at night but we are going to have a nice weekend so I might try not turning it on for the first time. They are also going outside for a few hours each day this weekend too. They seem to grow leaps and bounds after a few hours of real sunshine! Dandiemandi, I was born in Fort Bragg, CA...53 years ago! My family used to own what is now the Casa Del Noyo (I think that's what they call it).