Hello, I have a 7-8 year old Sinaloan milk snake. She has had a perfect health record in completely sanitary conditions her whole life. Large habitat, 2 hides, one large water dish she likes to lay in for a bit, a small one she drinks from (don't ask me why she doesn't interchange the two), a climbing branch, a few decorations and about 3 inches of damp shredded coco-bedding. Humidity at 50%, heat when necessary provided by heat lamp (not the best, I know, but I haven't had the money from my paychecks to replace her under the tank heat mat). She has two rat pups every week. She is about 2 or so feet long. Problem: For the past two weeks, scales on her back have begun to....to shrivel almost. They just sort of shrivel up and disappear. At first it was only a few, but now it's spreading down her back slowly. Others still are turning milky, and others are sticking up. I don't think it's damage from her innumerable escape attempts, she's always spent a good chunk of her day trying to escape. There is nothing in her cage new or different, save for a new climbing branch that I dried and baked. No sharp edges there. There is no other damage to be seen. I really am at a loss for what this is. I will be doing a full tank emptying, changing all the bedding, and sanding down edges even further. I am terrified it could be a disease or fungus. Thank you for taking the time to read this, and I hope someone has ideas.