Will my chickens get too cold in the winter?

If you're worried in minus temperatures, you can insulate their coops, we recommend using a thick layer of cardboard to line the floor, then cover with a thick packed layer of either wood shavings or treated straw bedding such as Dengi, a nice layer about 5 inches thick should be sufficient. Some keepers will also put an insulated picnic blanket over the coop roof, and some even pop in a hot water bottle wrapped in a towel at bedtime.
Offering high calorie treats in the afternoon can also help keep their metabolisms burning through the night which keeps them warm, things such as warm porridge made with water, sweet corn or lovely dried oat and corn mixes are all good to offer.