Found one of a hobble
https://www.backyardchickens.com/threads/duckling-niacin-deficiency.756861/page-5
https://www.backyardchickens.com/threads/duckling-niacin-deficiency.756861/page-5
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How do you feed steak to a duckling? they have no teeth to chew and would need chick grit to grind. Best to stay on the B-complex first and focus on eliminating a niacin def first.Since his chances are dwindling rapidly, maybe try feeding him fish or steak. There are also these threads about how to treat with vitamin b liquids and pills.
https://www.backyardchickens.com/threads/injured-gosling-possible-niacin-deficiency.1467273/unread
https://www.backyardchickens.com/threads/niacin-deficiency-in-waterfowl.1367557/unread
It may be a parasitic pathogen in which you would have to treat specifically, such as cocci. That will be complicated to treat while also giving Vitamin B. I like the people food idea unless you're experienced treating cocci. I've never treated a duck.
Where did you find this statement?This is why you shouldn't give ducklings any calcium other than what they are getting naturally in their starter.
No adult “layer” food should ever be given to ducklings, not even as an emergency food source. It is toxically high in calcium to ducklings and will cause serious health problems, and even death. ... Ideally, ducklings, should eat a waterfowl starter food.