well the cold snap had passed somewhat...it is still ranging between -30 to -35 with the windchills. everything was fine but then I noticed they were getting too cold when allowed to go out int he run, which by the way is tarped to avoid drafts. so I have been keeping them in. However the last few days the chickens have started acting odd and more aggressive. pecking each other, flying at us when we go in the coop, rushing the coop door all at once and in general seem to be quite upset. in these temps should I continue to hold them in until the temps normalize a bit or allow nature to take its course and give them their freedom, I am just so worried that they will get sick if allowed to go outside in this cold....by the way they are usually out there all day long its only been a week and half I have had them in because of the minus -40C cold snap we got. Now its -34C, which is about the same in Fahrenheit. freedom?? or keep them in for their safety??