Our chick hatched Wednesday, 3 days ago, and this morning is very lethargic, sleeping, lying on her tummy, one or both legs limp out to the side or behind her. Her vent is clear, but she is under a broody hen who may be caring for it. I mixed up some vitamin water: filtered water, sea salt, sugar, baking soda, a few chick crumbles to dissolve into the "tea," and ACV for probiotics with a touch of fresh ginger in case of infection, and drinking that seems like it is helping slightly. She can stand slightly, but quickly tips to the side and lies down. She has vomited several times a clear mucus substance, the first time with a tinge of pink in it. In this photo, she is wet from the water dripping on her while we dipped her beak in it, and we noticed that huge bulge. Is that juts normal crop? It seems watery, not solid. No opportunity to go to the farm store today, so is there anything else I can do for her? We lost one a day after hatch Thursday to a similar mystery lethargy, but this is the first time I've tried homemade electrolyte water. Thanks for any help!