Hi. I am new to this. I have been raising chickens for about 3 years now. I have 11 hens, 4 of them are about 2 months old and I call them my "teenage" chickens. This summer I recently added to the original coop which was about 4 X 4 feet. Now I have 2 coops under one roof. I added about 6 feet more and have 2 layers of wire between the youngins and the older girls! I have 2 grown wyandottees, one golden and one silver-laced, 2 black sex-link, 2 rhode island reds, and one buff orpington and I lost one of my buff orpintons to some kind of predator. Since that I have sturdy coop doors and locks and a light which turns on when any movement is detected at night. It is solar powered. I stumbled upon this website by accident when looking for some kind of solar heating lamp. I'm trying to get away from having to use fossil fuels and the expense of electricity. I have the heat lamps, not just for he chicks to start with, but also to give them more light in the wintertime and keep their water from freezing! Oh, forget to say that my four new girls (2months old) are 2 silver-laced wyandottes and 2 barred plymouth rocks.