I think she has something still in her foot.
Please read Post 19 of this
https://www.backyardchickens.com/t/639013/my-girl-mildred-ninja-duck/10#post_8620731
Epsom salt has a reputation for drawing things out of a wound. Romy had a similar problem and I took her to a chicken vet who was good at getting splinters out, and she got the tiniest little splinter out of the top of Romy's foot. It was amazing.
I have used Epsom salt to pull a deep splinter out of my own heel. I made a poultice and wore it for a couple of days.
Please read Post 19 of this
https://www.backyardchickens.com/t/639013/my-girl-mildred-ninja-duck/10#post_8620731
Epsom salt has a reputation for drawing things out of a wound. Romy had a similar problem and I took her to a chicken vet who was good at getting splinters out, and she got the tiniest little splinter out of the top of Romy's foot. It was amazing.
I have used Epsom salt to pull a deep splinter out of my own heel. I made a poultice and wore it for a couple of days.