Our fist batch, several years ago, went all wrong and only one survived. Since then we've learned a wee bit more. If you want eggs in the Summer, brood them later Winter or early Spring ... "indoors"! We had another small group we bought at about 6 weeks old ... stroke of genius! They were our first real layers. Bought them old enough to survive the upcoming Fall and early Winter, and got our first eggs on Christmas morning! Sadly, they were all killed that following Summer by community dogs. We have since reinforced the coop and run and we now have our girl Maddie, an Austrailian Shepherd, who has taken the flock under her wing. Godzilla couldn't get close to these yardbirds! We are now brooding a batch of 1 1/2 to 2 1/2 week old chicks on the screened in back porch. Only using a 100 watt normal bulb and everyone is doing great. About ready to put them in the lower level of the coop, segregated from the bigger hens and rooster for a few more weeks until they're all pretty feathered in, where we will still use a lamp at night, then we will incorporate all together. As you (or someone) said earlier, they just thrive more outdoors in the dirt and grass and sunshine. Would have transferred them this weekend, but we have suddenly been overwhelmed with Red Mites! Already killed one hen before we knew what was happening. It is now being completely treated (but that's for a later post).