I have my first batch of Cornish rock. They are 2 weeks old right now and outgrowing the brooder quickly. I feel like it would be optimal to wait until they are 3 weeks old and also for the nighttime temperatures to be over 34 degrees, but they are really getting crowded fast. I'm considering putting them out in the coop with a heat lamp this week. My major concern is that this week, the nighttime temperatures are predicted to dip down to 20 degrees a couple of times. This has given me pause, but im getting more and more concerned about them getting too crowded in the brooder. Does anyone have anything to share about their?