I have 7 chicks that are about six weeks old sharing a 2 1/2' x 3' x 1' tall brooder made of 1/2" hardware cloth. I've already applied one coat of "no Peck" and it seems to have helped. I think I will need to give them another treatment because I'm concerned their pecking is because they are sharing too small a space. In two weeks I have three days to build the coup and run. I have made the 6 nesting boxes which are modular and can easily be installed in the coup (see them at my site at http://mysite.verizon.net/reswuzne/index.html ), so I have no fear of completing their new home on the long weekend. Another concern is they have been under the brooding light 24/7 since I got them. Do they need darkness? The weather has been cold lately, so I can't let them be without the heat. Using the brooder lamp and keeping them in the garage has been their protection of not falling below 50 degrees. We brought the cage in last night when the temp got down to 24 F. I worry that the bulb might burn out and they would be in 40 degree cold. Can many of you answer my concerns?