Okay so my parents are worried about my chickens having frost bite, i have 2 vents on the front back and on the sides is 2 inches of wire for ventilation on both sides. I know i shouldn't put a heat lamp in but at Clyde's when I bought a bag of food for my chickens the clerk said i should but a standard light bulb not a heat one because they throw off a little heat and some light for them to keep laying.My whole flock is around 8 months old this is their first winter for them and my first winter with having them. My coop is 8x4 and pretty small. But I don't know to put one in or not.