Today I tried switching lightbulbs from a heat lamp to a 100watt bulb. My chicks started acting nervous and though they still ate and drank and scratched around they seemed more on the alert than usual and more tense than usual(more flighty behavior). When I switched back to the heat lamp the difference in their behavior was quite noticeable and they were much calmer. I was wondering if anyone else has had such an experience or knows off-hand if lighting can change a chickens behavior? Do you think it is because they were not used to such lighting, or could it actually be that a heat lamp is a more soothing color for the chickens? Just curious.