sick easter egger
How old is she? What do her droppings look like? Has she been wormed recently? How well is she eating and drinking? Can you check her skin all over and under her vent for evidence of tiny bugs (lice or mites?) Coccidiosis is a common disease that can cause puffing up or hunching, diarrhea or blood in stools, refusal to eat and drink, and extreme weakness. It is more common in chickens under 20 weeks old, but also may occur if new to the soil. Corid (amprollium) is good for that.