Our temperature tends to be closer to CJ than GP and we don't use heat lamps unless we get extreme snap. Your girls will be fine as long as they are dry and out of drafts. If we get the week of 28° for the daily high temp I will probably give them some heat before bed but they usually don't need itYes I just got them this spring so not even a year yet. I figure it has something to do with weather. I haven't seen signs of critters I treat regularly for mites and lice and have a enclosed run so no skunks. We have got tarps to put around and over the run fresh dry bedding. My hubby is going to put the heat light in for night time ( so they don't get cold) the run did get muddy this week so I've got some straw to lay down in the run. But I'm a little worried about them I know I over worry being a first timer but this isn't normal is it?