I have a 2-1/2 y/o California White hen who is an excellent egglayer. She is free range most of the time, has a nice warm house that I close them all up in at night, and she is the highest on the totem pole right now. She seems very happy and healthy. The only thing is that her eggs are wrinkled! They didn't used to be, but then I started finding a wrinkled egg now and then. Now almost all of her eggs are wrinkled. She lays 6 eggs per week. The wrinkles direction goes from end to end, and other than the wrinkles there in no other change in the shell at all. Her feed has not changed at all, she gets free choice lay mash, cracked corn, poultry scratch, and whatever they eat while free ranging.