I can see by the picture that the turtle is shedding scutes ~ if you look at the photo of the Spotted Turtle that is is shown when you first sign onto this forum, it looks like the same turtle (condition wise anyway.) If your turtle is alert, active and actively eating, I wouldn't be concerned.
Concentrate on giving the turtle some real food anyway! Live food, crickets, Beetles, Fish etc., and the occasional fuzzy mouse. Good luck and continued success E-Mail if you have questions, Leo
Skin & Scales