I have a couple Russian tortoise yearlings that seem to be having some eye issues. I keep all my adults on cypress and my hatchlings I've always kept on coco coir because I like its ability to hold humidity and it's not as messy as dirt or some other substrates. I've never had issues before, but this is the longest I've ever kept hatchlings, I usually only keep them a few weeks. The two yearlings seem to be itching at their eyes more than usual and seem agitated by them. Has anyone had any eye issues related to coco coir or any other ideas what might be causing this? Temps are fine, they are eating and pooping fine, everything else seems to be on par.