In some places it is possible and successful to raise chicks without added heat. As I stated earlier, I add no heat to my chicks that I hatch during the summer because external temperatures are at least 95 degrees and typically exceed 100. Having additional heat would kill the chicks. Whether or not heat is needed depends on where you live and what season it is.As I stated earlier IF raising chicks without a heat source was sucessful, we all would raising our chicks in that manner.