You are so very welcome! I do apologize for getting a little long winded, but I am so enthusiastic about this method and the success everyone is having with it that I tend to get overexcited!
I don't do anything for mine by about 4 weeks old, and they do just fine. The first nights they pile up in a puddle of feathers and beaks to stay warm and for security. I never use a heat lamp. Not ever. I'm just like you - I don't trust them, I don't like the risk of fire, and I believe...