Forgive me for forgetting, but I think one of these stories includes vitamin E dosage.
https://www.backyardchickens.com/t/761308/peking-duckling-with-crooked-neck-help
https://www.backyardchickens.com/t/857143/treating-wry-neck-in-crested-duckling-edited-title
https://www.backyardchickens.com/t/761308/peking-duckling-with-crooked-neck-help
https://www.backyardchickens.com/t/857143/treating-wry-neck-in-crested-duckling-edited-title