4 week old chicks....when do they start roosting at night with mom?

[StephanieD]

I have four-4 week old chicks and their adoptive chicken mom. My question is when do they start roosting at night with mom? She is still laying in the nest/crate at night.

 

[donrae]

My brooder chicks are seven weeks and showing no signs of wanting to roost. They still make a pile on the ground, I think that's warmer, even though they're fully feathered. I think they'll sleep under momma as long as she'll let them, or until they really don't fit.