We have 20 layers and have been getting 12 eggs reliably every day, even in this cold upstate NY weather. We were stunned today when we went out to the coop and there were no eggs. We have 10 Red Sex, 5 Amber White, 2 Buffs, 2 Barred Rocks and 1 RIR. There have been no changes in diet or run/coop. We have a predator problem so they have been kept in the coop with adjacent run. They do appear bored and have been pecking eachother - so there are several with bloody wings. We treat the spots with Blu-Kote to avoid further injury. A few hens started molting earlier this winter, but not all of them and they are all done by now except one. We find it hard to believe that we could go from 12 to 0 in one day. The coop/run is not visible from the road so only our neighbors/friends know it's there - so if this is a theft, someone would have had to go out of their way to walk around our property to access the coop/run tucked behind a hill on the other side of our house. If this is due to cold weather, wouldn't they have gradually slowed down weeks ago when we had weather below freezing, even below zero? There are no signs of predators getting into the coop at this time. Baffled!