I have 21 chicks around 4 - 6 day old chicks currently living in an indoor brooder. I have 2 broody hens that I plan on giving the chicks to. I'll give one 11 and the other 10. A bantam cochin and a silke mix would be able to cover 10-11 bantam chicks each, wouldn't they? I'm worried about the night. The chicks live in a 20°C room right now and it gets down to like 3°C outside at night. As long as they're under a hen will they be alright? And it's best to give a broody chicks when it's dark, right? Should I make sure both have some eggs under before I give them chicks just so the chicks wouldn't appear from thin air?