I have heard some folks refer to scratch as just corn, and others refer to it as a mixture of corn and grains. So question is if you are not supposed to feed your chickens scratch in the summer because it overheats them, and some folks consider that corn. Then why do they mix corn in their everyday feed in the summer? I buy Purina's scratch is it okay to give to my chooks year round or should I not give them scratch or cracked corn at all in the summer? Some folks is confusin' me!