Hopefully I'm doing this right! I just got a chicks 2 of 4 breeds (Amerucanas, Bard Rock, Brahmas, and Buff Orpingtons). I'm not sure how old they are could anyone guestimate? I've noticed a couple panting so I've unplugged the heat lamp for now... they are living in my bedroom for now so they're living like royalty and won't be too cold? How old should they be or what should they look like before I remove it completely?