All of my hens are the same age, give or take a month, except for my Plymouth Barred Rock, who is only 4 mo. I have different breeds and they are all laying except for my PBR and one of my Silkie Americauna mixes. My other SA mix is a consistent layer. About 3-4 mo ago one of my SA mixes stopped laying and I have no idea why. She started laying at close to 6 mo of age this summer, like the other mix, but then stopped. I have no idea why. We keep our coop outfitted with an infrared lamp for heat that is on at all times and we also have a regular bulb that is on a timer that has been extending the daylight by a couple of hours here with our shorter winter days. Not only is she not laying like everyone else, she is very vocal and loud. I doubt my neighbors appreciate that. My husband wants to turn her into dinner based on the aforementioned issues. Any ideas/advice is welcomed and greatly appreciated. Thanks in advance!