I put some chicks outside this past weekend and they seem to be doing fine in the coop with a sweeter heater. It has been 20-30 degrees Fahrenheit recently. Over the next few days it's going to dip down into the negatives. There will be a wind chill affect too, but my coop is draft free so I'm not concerned with that. The chicks were some I purchased so I don't know their exact ages. I would guess three of them to be 3 months old, and one might be closer to 2 months old. Do you think they'll be okay in this cold with a sweeter heater?