Urbanmom...
They'll let you know if they need heat.
My 3 wk olds are completely out from under mom - have been even when it got cold. Except at night when they go at least under a bit with their hinney's in and about half sticking out. I think mostly because they want to be sure to feel mom in the dark.
If I were brooding without a broody, I'd get an ecoglow and keep it available at night. If they need it they'll go under.
http://www.brinsea.com/prod-EcoGlow_Chick_Brooder-239.aspx
![]()
I have an ecoglow, and I really like it. I've successfully brooded both chicks and poults with it. And it uses very little electric as opposed to a heat lamp. No danger of fire either. I do have to say though that it is nothing compared to a broody hen. Having someone else do all the work is definitely the way to go.