Help!

Hello! I just recently bought some frizzle hens and a rooster. The lady I got them from gave me this guy as well. He’s very lively but is having some balance issues. He doesn’t really try to walk. Just flaps his wings. He doesn’t have any apparent injuries. I’m currently quarantining him and giving him water with electrolytes&vitamins and he has slightly improved but I was wondering if anyone else had any other suggestions to help him??