I'm at my wit's end here, and will likely have to conduct my first cull if I can't find something, ANYthing to relieve his symptoms. I've tried researching as much as I can, and am left to simply ask if anyone can think of anything I haven't. Perhaps it was cocci that he's had all along and I didn't catch it in time/treat long enough. White Leghorn, 5 weeks. Very sudden immobility, unresponsive, unable to stand or eat (on his own, initially). Flailing about occasionally, and the last 2 days gaping / gasping, fluffed and shaking. First symptom about 3 weeks ago, cocci, treated and assumed cured. None of the other birds. 13. No obvious sign of trauma, but I'm new, so uncertain. Could have been injured, could have had cocci all along and it was never cured. Could have gapeworms but hasn't responded to Ivermectin. He munched some corn, as did the others, the night before. All are on phase 2 chick food. Occasional yogurt, boiled egg, vegetable. He started eating again briefly on his own, then stopped. Will accept stuff through a dropper. Poo was with blood, but is no longer. Seems normal now. I've administered Sulmet, which stopped the bloody stool. Wazine and Ivermectin in case it's worms. Vitamins, too. I'll try everything myself, then cull because I think he's in pain. The chicks have all been in a huge bathtub box. Pine bedding changed completely every 4 days, topped every day.