Yes I ment molt, sorry, English is not my native language..
But thank you for your concern... Yes I agree, that would be a nightmare...
I just gave her the first vitamin E capsule... So relieved that I finally began real treatment...
So…. I once had a pullet that did this same thing, and also backing up walking in circles, sinking to one side.
This really upset me as I had no idea what her problem was. But I could see that she had absolutely no issues with running after treats I threw down and hopping up on things; she had issues flying up on tall things as she was in a very heavy moult. But she had no issues with running and zipping around if she had to.
Then I noticed she did the sinking down sideways thing when I touched her - I realized it was her pin feathers coming in, I imagine the sensation of those feathers on her belly and legs were uncomfortable to her and she was moving in a manner to try and avoid the discomfort. And when she was distracted by treats those symptoms disappeared.
I have had horses so similar things for Sweet Itch on their bellies, having that experience helped me make the connection with the pullet.
At the moment I have a hen that is moulting and she is doing the same as your girl, I will try to get some video of her gait so you can compare.
I see you’re giving Vit E and B which is fine; but as Vit E is stored in fat I would limit how much you give, too much of a good thing can cause it’s own issues; B vitamins are generally excreted if there is an excess in a body, so that is safer to give. If you can find a proper poultry vitamin mix that you can add to water, you might want to give this to your flock while moulting.
Re: wormer Mebendazole, I would wait until your birds are done moulting as a
similar med (fenbendazole) which is also a ‘benzimidazole’ compound can cause feathers to grow back with defects on them.