Nice brooder. You'll know it's too small when they start making jail breaks. With so many it might not be long. If the weather is nice, you shouldn't have a problem putting them outdoors. The last batch of chicks I had barely used a heat lamp. In fact, I think it was making them uncomfortable.
The sexes may surprise you! My BRs had white spots on their heads and they're definitely female. Good luck!
The sexes may surprise you! My BRs had white spots on their heads and they're definitely female. Good luck!