To start off, I am new to having chickens. Before getting our 9 hens, (3 BR, 2BO, 2 EE, 1 RIR, 1 LH) we did a lot of research on runs, coops, taking care of our girls and so on. We brought them home in June and have been in with them every since. For us, they are pets and we do our best to provide everything they could want and need. So this is my issue...we bought a large snap lock coop and have it secured and attached to a 8x16 run that their coop door goes into. Today I noticed frost inside the coop and panicked. Girls are fine, healthy and not frost bite. The coop is cleaned every morning, theres no wet bedding but I had the vents 1/2 closed because Im afraid they will get a draft from being on the top of the roosting area. We are replacing the coop in the spring so I have to make due with this for this winter and we live in Ohio where it rains a lot but winters can be brutal. Can anyone give me some suggestions on what to do to keep them safe/healthy from moisture and frost bite until the new coop is built this coming spring. My husband says to keep the vent all open not matter what the temp is...I am a city girl (now live in country) and have never had an outside pet and worry about the bitter cold. Last night the temps got into the single digits but the weather for the last week has been rain and the ground is still saturate with water. Any suggestions helping me get through this winter would be greatly appreciated.