So about the time of the first snow here in canada, id say sometime in late november.. my neighbors dogs attacked my flock and killed two of the chickens. Some of my older birds had stopped laying already but i was getting 13-17 eggs a day from 24 hens. (that includes the 10 older girls and the 12 that were just starting to lay) (during the summer my little hens were babies and i was getting 7-10 a day from the ten older birds) Anyways..so after this dog attack, literally the next day egg production went down. I was only getting 6-8 eggs a day and sometimes less. That was more than a month ago and i never get more than 8 a day now! After the attack i kept them in the coop all day for a week and after that they didnt even want to come out because of the snow so i just keep it closed now. I have 10 new birds left that are new and started laying at around the time of the dog attack. and ten older ones. i know that several of the older ones are not laying now that winter started. they started growing their feathers back as well. I have a light in there that is on usually as soon as it gets dark and all night long. its a cfl bulb though and only 30 watts so its not that bright, but easily bright enough to see well in there. So anyone know what might be going on? is my light not bright enough? did the dogs permenantly stop them? or is it just winter instinct settling in?