I lost one hen last week, and I've been treating the rest of my 3 girls with Corid. One was really bad, and I feel like I caught it in time, but she's still far from better. To sum it up, they are all around 3-4 months old. Not laying yet: Chick 1: dead - loss of movement, lost all her weight, in hindsight had always held her head close to her body, found with lice on her as she faded. It was 2 days of me battling her, she improved over one night, but in only a few hours got worse and then didn't make it through the night. Chick 2: was limping, nothing but feathers and bones, panting, having trouble keeping her wings up - NOW, walking and acting fine, put on a tiny bit of weight, still has bloody and watery poops, losing a lot of feathers, wings are still drooped but she's not readjusting them with every step Chick 3: was fine - NOW, lost weight, holding head close to her body Chick 4: Appears healthy I was treating with 3/4 tsp per gallon, but then I read that this was too low, so for the last two days I upped it to 1 tsp, which I'm now reading is STILL too low. They've been on it 5 days...do I keep treating them? Do I up the dosage? Or do I take them off it and give them vitamins and such?