I'm Stumped?

[easttxchick]

I had a Black Sumatra chick that hatched out on Saturday morning and a Pyncheon Bantam that hatched out Sunday. I thought I could brood them together(despite a bit of a size difference), but the Sumatra chick immediately started pulling Pynchies toenails, eye poking, etc.(to the point I had to separate them).
Each chick has a stuffed toy, heat lamp, mirror, etc. and their little brooders are side by side-where they can hear, but not see each other.
All was fine until yesterday when I took them out together to let them stretch their wings and legs. Of course, Sumatra baby started picking on Pynchie baby so playtime didn't last long.
As soon as I put them back in their brooders-Pynchie baby started peeping and basically hasn't stopped since about 3 yesterday afternoon. She isn't cold, is eating and drinking fine, movin' and shakin' in her brooder(seems very healthy).
Is this just because I actually let them interact yesterday and then separated them?
I have hatched/brooded quite a few chicks(even single chicks) and this one has me puzzled(and looking for earplugs).
Thanks for any input.

 

[sourland]

Sounds like she's lonely. Even with the pecking order abuse she wants the company.

 

[Robo]

Try letting them see eachother through wire. Or put gauze on their feet. That's what I do when their feet bleed, and it also prevents more pecking.