I have had that problem before but only in baby chicks
which two have it now. They have a liquid you buy from
feed stores that is called I beleive Coccidiosis and it works really well and fast.
Just ask where you get your feed from they should no
what it is,
good luck hope they get well soon
I have that same problem with a game chicken but she
wasn't a good mom she killed them, and still is sitting
on nothing, I think i will put some golf balls under her
like someone else did.
That very intersting let us know what happens with your hen.