Three-month-old Welsummer pullet isolated herself today. The usually pinkish color around her eyes/on face is pale. She is mouth-breathing while she sleeps. Her voice sounds hoarse when she "talks." She poops water. She is still attempting to eat & drink. I have brought her in the house in a box. Providing her lay crumbles and electrolytes. She just seems puny at this point, not emergent. Any idea on a diagnosis and treatment beyond what I'm currently doing. Thanks.