Last year when I started my chicken adventure I went with 6 RIR chicks and a red heat lamp. The chicks were fine but my electric bill zoomed sky high. This time I am getting 4 BR's on Wednesday. I purchased a brooder plate from "Rent a Coop." I understand the chicks will huddle under it as if it were the warm mama. But all chicks are not the same size, or are they? Moving them into their new home will be stressful enough so I wanted have the brooder plate warm and low enough (but not too low) when I got them home. So, what height should I start at? Thanks for your help with this.