I'm looking for a sanity check on this. I have an eight week old Breda. The initial symptoms were a dropped right wing. She seemed too young for Marek's, so I immediately assumed vitamin deficiency and started supplementing. She got worse. This progressed to right leg paralysis. The chick was still eating and drinking, but losing weight. I added Selenium and additional Vit E to the B vitamins I was supplementing with but there was no change. I resolved myself to the inevitability that this chick would need to be put down and made arrangements for a necropsy afterwards. BUT, for some reason before I actually did it, I gave the chick some Corrid the night before I planned to put her down. I can't explain why, other than it was the only thing I hadn't tried, and I really hated the idea of losing this chick without leaving every stone unturned. (I know that cocci feed off Vit B, so I figured, what if that was causing a deficiency). The next morning, the chick seemed slightly better. I decided to try to treat her directly for coccidiosis instead of just mixing it in the water. (I had actually treated the whole brooder for coccidiosis two weeks before the onset of these symptoms) She has improved every day since then. She is still not 100%, but she has regained use of the leg and is able to stand and walk upright. Now, I'm just curious for future reference. Does it make sense that coccidiosis could present itself in the form of a vitamin deficiency to the degree of causing paralysis?