I’m having then same problem. Mine looks more like skin around the toe that is opened. I thought this morning we were good and then left them out tonight and she opened it up again I soaked it and put hen healer on it. The toe nail looks dark in color compared to the others which are tan. I don’t think it’s dirt as I took a q tip to it to the toe to try to clean it out. I know it hurts her because she doesn’t alway put weight on it. I did put neosporin on it yesterday should I go back to using that?