I have 3 hybrid hens that are excellent layers and never miss a day, they are about 1year and a half old, ive also got a white leghorn cockerel and a cuckoo maran, both born this year. The cockerel and the maran are in excellent conditon bt my 2 of my laying hens are looking a bit worse for wear. one especially, i have debugged them all, wormed them all and not sure what else to do? they all eat well and seem happy enough but just look hard done to! I get at least one double yolker from these hens a week. I read in a mag that sometimes good layers put lots of effort into the eggs and not into replacing feathers, is this true?