Using the hay-box chick brooder is a simple technique which conserves the metabolic heat produced by the chicks, and thus keeping them warm. Unlike other brooders, this device does not require coal, oil, or electricity for heating. The following description gives detailed information on how to build and manage the hay-box, in addition to tips on how to preserve the box and the chicks during the different seasons. Details are also on how to maintain the required temperature based on experiences in Ethiopia. The hay-box chick brooder which is not using any artificial heat is an ESTC (Ethiopian Science and Technology Commission) award winning technology developed by Prof. Solomon Demeke at Jimma University College of Agriculture and Veterinary Medicine (JUCAVM) (Solomon, 2003).