I have 2 chickens who have been laying since the end of june. The were born feb 15th and have been laying since july 27th pretty regularly. Little over a week and a half one of them stopped laying. I thought after 3 days maybe she was laying in the yard so I penned them up in their coop for 3 days and still only got one egg. I live in Duluth MN and I know we are getting darker sooner but I wouldn't think that this would make her skip so many days. The chicken looks healthy and still hangs out with the other chicken. So why did she stop laying?