One of our chickens (we have eight, all are 3 yrs old) is lethargic and not moving much since 3 days ago. Symptoms: Started appearing lethargic 3 days ago. So we started handfeeding mealworms and yogurt 2 days ago. Seemed to be getting a little better with that, but not any more. Crop is a little hard, but so is rest of flock. No signs of lice/mites.Vent appears pink, but not infected. Started Corid 1.5 days ago. Todays she's not good- closes eyes mostly, stays seated, head drooping, not walking, barely eating or drinking. Diarrhea was clear a few days ago, now only sign of poop is greenish and dried on feathers. No sign of worms. How long does it take Corid to work? it's been 36 hours and she seems worse. Can we start de-worming now? if she doesn't eat, do we force feed/drink with dropper? What should we do? Please help!