Our 18 week old Domonique pullet is very sick. We noticed yesterday she was puffed up and sitting alone in a corner. We brought her inside offered her some mash with yogurt which she ate a little of, I gave her some water with electrolytes in it with a syringe. She is very weak this morning. I gave her another syringe of fluids this morning, she is still very lethargic. Her poop is very watery and almost clear with a slight tinge of green. The other pullets are so far, unaffected. I live on the coast of norther California and our weather has been hot but not overly hot like 78-80. The coop is in mostly shade. Of course she is one of the family favorites, any help or advise to what this might be would be greatly appreciated. I've never seen the likes of this illness before so have no idea on how to treat her or what I should be giving her. I am going to the feed store later today if anyone has a suggestion as to what I can be giving her, I can pick it up asap. Thank you!