I know this has been asked a million times because I have googled it and seen multiple questions BUT it is supposed to be high of 13 low of -10 and high of 17 low of -2 this weekend here. I have 6 ducks I keep in an outdoor coop. I use shavings and added some more for the cold. I also was considering putting a heat lamp in the coop. However, will the ducks be ok outside at these temps? In addition, should I let them out of the coop during the day. Generally I let them free range but I don't know if it is too cold for them to be out?