It's scale rot for sure. My big girl just was cured of this. I soaked her in 85 degree water with betadine added in until wen stirred it has a weak tea color...... Also make sure that her "home" is disinfected along with her water bowl...... Lastly make sure that her cage doesn't have any place where she is goin to be in laying in water......meaning if she spills her water bowl clean it quick.....
My happy girl after her treatments
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