Red lights in the dry cow pen play a bigger role than most people realize. This one change can support cow physiology in ways that directly affect the next lactation 🔴🐄 Light exposure regulates the cow’s circadian rhythm through the pineal gland. In darkness, cows produce melatonin, a hormone that signals rest, reduces cortisol (stress hormone), and helps regulate immune and metabolic function. White or blue light at night suppresses melatonin, but red light does not, allowing cows to remain i