I purchased 25 chicks from Murray McMurray. They are all really healthy and active. A friend of mine who has raised chickens for his whole life tells me they're HUGE for the age of 2 weeks. Here's the issue though. They need to come home! They are staying in the Ag Classroom at my school under a heat light. The kids have them tamed to be WAY too friendly. They are standard sized, and supposed to be all pullets, although I have doubts about two. They have a 12X12 horse stall to stay in. The barn is PARTIALLY insulated, but it gets down to the mid to low 30's at night. If I cut the stall down a little and bed it deep at night would they keep warm by "cuddling?" I use shredded office paper as bedding which is a little warmer than other kinds, due to my 18 yr old horse's pine and dust allergy.