Posted: Sat Aug 18, 2007 4:08 pm
If their plastrons are having contact with the slate as they push themselves off, I'd watch for signs that their plastrons aren't getting any wear on them. Even stones/rocks that have seemingly smooth surfaces can abraid the shell fairly quickly if it's rubbed over them.
"You become responsible, forever, for what you have tamed." -Antoine de Saint Exupery-