It's amazing to me how quickly the grow! It seems like just yesterday I got my little chipmunk looking girls. Now they are almost 4wks old, and their colors are really coming in. Another week or so and they'll be moving out into to coop. I have a question though... at what point do my babies no longer need the heat lamp? I ask because sometimes the sleep under it but most times they sleep as far from it as possible. I dont even have it very warm in there anymore... temp currently reads, 77 degrees.