I use brewers yeast and I had one other duckling that had a curled foot but once I started using the brewers yeast, its foot straightened out. This one’s legs are deformed and also has the curled feet. It doesn’t navigate any better on anything else.
This baby is roughly a month old. I got it from tractor supply. Its legs and feet were straight when I brought it home and I didn’t notice when they started to curl. We did have an issue with a niacin deficiency but I corrected it and all three of mine have been fine ever since. I’m in the fence...