Hello. Today I just notice some of the thin layer on my 1 year old leopard plastron flaking off. I've looked in other threads but haven't found a similar case like this. Is this the start of the shell rot forming? He stay outdoor for 6hour and stay in humid enclosure indoor with humid coco coir substrate at night. Before I use fir bark since he's hatchling but change to coir since January. Has anyone had a similar experience?