I am so excited!! Like clockwork, my silkie eggs hatched on day 21 under my broody cochin bantam. And I mean right on day 21...we set the eggs under her at 5:30pm and 21 days later they hatched around the same time!! I was amazed. The upside...a broody hen is way less stressful than trying to incubate eggs!!! The downside...I hardly get to see my/her little babies because it's cold outside and they stay under her. We moved her into the coop, in a box separated from the other chickens, after the chicks hatched. Do they need any additional heat source other than their mommy? Will they get out from under her and eat/drink? Daytime temps are in the low 40's and nighttime temps are between 25-35. We did take them out from under her to show them the food and water, but the went right back under.