Okay, so I am a coddler. I know this about myself. I have worked hard over the years to curb this tendency, but am not always sure when I need to, so I am seeking guidance. I am in the Piedmont of Virginia and we are having a colder fall than we typically do. I am a first time chicken owner and stupidly choose to start with day olds in the fall. My girls are now 5.5 week old pullets and have moved from the brooder to their roost very well. I have been researching on this site and others the debate about heating the coop or not and really understand the not heat point of view, so I have been slowly raising the heat lamp and have only been using one of the two we have. Last night was our first night cold enough to freeze their water, and it only warmed up to about 35 F today. When I checked on my girls, 10 of the 11 were acting well enough (walking around eating, flying onto the perch) but had cold feet. My one little leg horn run, however, was shivering. So, I caved in and put in the other heat lamp. Although I feel fairly confident this was the right choice for my runt I now have two concerns. 1. Have I ruined my chances of accommodating them to the cold weather for the winter? Should I even try this winter, or are they still too young? 2. Is this choice detrimental to the other girls, or is it a reasonable choice since they had cold feet? Any and all guidance appreciated. And Happy Thanksgiving all.