Thank you all for the info in the above posts. We are experiencing a similar issue with our 11 hens. I want to go with the weather as the issue. My gals are about 10 Months and started laying in October but really got going in November. We changed their food about a month ago and production was steady. Since then we have had a couple of really solid cold snaps (here in Northern Colorado we had almost a week of negative temps and snow). They are roamers but with the snow at almost a foot around their coop and run they weren't too excited to go beyond their run over the last month. Last week we had another severe cold snap but were getting 3-4 eggs a day. This week on Monday we had 3 eggs, Tuesday 4 eggs - 2 were soft shells (hasn't happened since November when they first started laying). And yesterday, Wednesday - Zero. For now I'm thinking this reduced production is primarily due to the cold, this week we've had 40 - mid 50 degree weather so we'll keep watching. And to answer the usual questions - no problems with eating, water is sufficient, no fighting within the group, they've continued to get their treats (spoiled bunch that they are). the only major difference is a little less exercise time...