I noticed one of my turtles, Bartleby, has a weird gray spot on his/her foot. Any idea what it is?
I don't know what kind of care they've had in the past, so I don't know what this could be.
He's been really quiet since the move (tuesday, the 24th), but has a healthy appetite. He moves around just fine.
Does anyone know what that is? I'm worried.

