I recently received a batch of baby chicks threw the mail. (First time ordering by mail) I have only raised baby chicks one other time, and did great. This time has been horrible and heartbreaking, I have already lost 4 of my 10 babies I ordered by mail. I had one baby that wasn't alive when they arrived, and another I lost about an hour after they arrived. Then I lost one 2 days later, and one this morning. Could they be getting too cold? I have a brooder heat plate, and I have a heat lamp on while I am home. My husband is a fire fighter, and worries about the lamp, so he doesn't want it on if we aren't home.I have them in my sunroom. Its full of windows and it was an add on and there are no vents to allow warm air from the house in. I do have 2 rooms attached to the sun room with French doors. I leave those open to allow heat from the house in there. And I have 2 space heater with thermostats (they shut off on their own) in there running as well. It has been cool this past week here in AR, and the low tonight is 38. Should they be ok with just the brooder plate? Or do I need more heat? Could they be getting too hot? I was told by someone from the hatchery that the brooder plate is enough heat as long as the temp in the room doesn't get below 40. Thoughts? Opinions? TIA