Hen can’t use legs anymore

About two days ago, Jenn started limping. We assumed bumblefoot and bathed her with epsom salt, inspected her and added a drawing salve. We saw no black dots or swelling. She spent some time outside later that day and limped around a little. She wouldn’t roost that night, so I brought her back inside so she wouldn’t lay in feces from the other birds. Next day, she seems to not have much control over her legs. Started treating for vitamin b deficiency, worms, etc. She’s been getting vitamin enhanced water, eggs, and brewers yeast too. Today she can’t even adjust herself using her legs. Her eyes, wattles, feathers and skin all look great. Yesterday her appetite was great but she wouldn’t drink. Today is the opposite. The result is lots of watery poops, but no weird colors. She does not feel or act egg-bound either. At this point I assume it’s a vitamin issue that needs time to resolve, but I know someone more experienced than I may read this and have other ideas. Please help me help Jenn.