It's been very cold lately. For days the thermometer has stuck below zero centigrade, which is unusual here in Cheshire.
It's important to check any animals regularly in weather like this. You need to make sure they can get the shelter they need, and that their water is not frozen. I've had to go out with a kettle and melt the chickens' water a couple of times.
They're still laying really well. Last year they went off the lay when the nights fell earlier, and didn't resume laying properly until the spring. But there's been no drop in egg production at all yet, and midwinter is upon us.
But they occasionally lay eggs in strange places - this morning I found one that had been laid outdoors in the run, and had frozen solid overnight.