Pretty much what it sounds like. One of my turtles occasionally cranes its neck around and tries to nip its own front leg (usually the right one). Hasn't drawn blood or broken the skin yet, but it worries me a little. Does anyone have a possible explanation for this? It seems to be happening more frequently the last week or so. Maybe the turtle has an itch? Maybe it's bored?
Also, how early does the size difference between males and females start to become apparent? I've noticed that the foot-biting turtle is now about 1/8" longer than the other, and proportionally larger all around (bigger head, feet, etc.). I think they're about the same age. Does this mean I have a male and female?