I started over again this year with six chickens, a Buff Orpington, Australorp, Speckled Sussex, Ameracuana, Red sex-linked, Cuckoo Marans,and two inherited Hamburgs who were a year or so old. The Buff started laying at about 18-19 weeks, followed by the Austrolorp and Sussex. They laid quite nicely and along with the Hamburgs gave a pretty reliable four eggs every day until the Buff went broody and stopped laying, then moulted and has yet to start laying again. Over the fall and winter, the Hamburgs moulted and stopped laying and the Australorp and Sussex slowed way down. So I was getting only light brown eggs, and then lo and behold, in early January I began getting dark brown and medium brown eggs - the Cuckoo Marans and Red sex-linked were laying finally at seven months of age. Has any one else had this happen? Oh, the Ameracuana still hasn't laid anything or at least I've had no blue eggs. They are in the same coop I've used for years, eating the same organic layer feed supplemented with greens and whatever else is around, and allowed to free range for 2-3 hours a day. Nothing has changed except the chickens.