I started my new flock this year in spring and all was good until the weather changed .. I know that a upset chicken trys to not lay eggs ,this I know from previous flocks. So my answer for this is hot /warm water which I called tea ladies love the tea so when I took the tea Outback to give it to them one in particular chicken stuck it's stupid head under the running hot /warm water now she's sneezing "stupid chicken"so I found this place and got some answers about what to do.. thanks . I sure hope that this cold that this particular "stupid chicken "has given to herself doesnt wind up killing all my chickens. I had to replace my last flock after my Neighbor decided he didn't like them and rather than fix the spot in the chicken fence that allowed them into his yard he trapped them in his yard and killed them all. .. real nice neighbor .. ok well thats my introduction . I look forward to sharing and getting knowledge . Happy holidays you all...