I am currently dealing with the exact same situation. I did a 7 day treatment of corid. All was well for a week and I noticed one girl stumbling. So I am also assuming vitamin deficiency since corid kinda wipes them out. I am currently doing 2.5ml of poultry cell, poultry booster (in her non- medicated food) and nutritions yeast. My girl will stand and take 3 steps but is very off balance. I didn’t realize I needed non-medicated feed with the vitamins so I’ve only been doing that for a solid 2 days. Im hoping that she pulls through. Mine is eating normal and im syringing her water just to make sure. She is not drinking much. She did love the meal worms I offered yesterday. SHe did seem to be tired yesterday and maybe it was from the poultry cell. I didn’t know that makes them tired too. Good to know. Please keep my posted. My girl is in my extra bedroom in a kennel. She was panting in the coop and I think it was too stressful.