I just gave my 4-week-old chicks a tray full of dirt to scratch around in and eat worms. Two of them dove right in and took a dust bath. My EE, however, could barely walk afterwards...she'd clean her feathers a bit, fall over, get up, walk a few steps, fall over again, etc. She almost looks drunk. My RIR shook herself out like I've seen other hens do after a dust bath, but the EE didn't shake out. I also noticed that she seems to hold her feathers in, they seem less fluffy and she looks much smaller when she does this. Should I be worried about her?