That is funky looking. It does kind of look like a bumblefoot scab. I would try soaking it and seeing if you can debride/remove any of it. I bet it does hurt to walk on. 

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Ok so it seems to be a process of a couple weeks. I will start it as soon as I canThis would work for all poultry.
What do you recommend for Vitamin B complex? We have Vit B complex but it is chewable/gummy so I doubt that would be good for a duck, right?Place her where she is comfy and not having to use her leg much. Food and water close by and if it's a sprain rest and vit B Complex along with water therapy can help her get over it.
If it's bumble we can help with that too.
I use tablets, but I'd like to know what Lydia uses, too.What do you recommend for Vitamin B complex? We have Vit B complex but it is chewable/gummy so I doubt that would be good for a duck, right?