I have 5 chickens. 4 of them lay brown eggs and one lays blue eggs. So I know for sure one is not laying. The "easter-egger" stopped laying about 2 weeks ago when we had our first cold spell. The others are still laying about one a day or every other day. The chicken that used to lay blue eggs doesn't act sick, she just doesnt lay. I know in winter they slow down and a cold spell could shock and stress them. But it has been much warmer for the past week and she is still not laying. She is only about 7 or 8 months old. Any thoughts????