So after a trip to the vet today with another duck he said that this is just a callous or dead skin.
He said not to worry about soaking her with epsom anymore or applying neosporin.
As he watched her waddle in his duck friendly room he said that she is walking just fine.
He asked his assistant" did you hear that'? she said "no what" he looked at her and quietly said "Aflac"
I had a wonderful experience at this office and I'm pleased with how he handled my ducks.
I would recommend him to anyone in the area.
Thank you all for your help.