hi my neighbor found a box shell turtle about 7 inches and nobody claimed it so I ended up adopting it. I filled a kids pool full of dirt and a water area and a curved log with shade and a heater at the bottom of the dirt, The turtle stays buried for days and I have to constantly pull him up to eat. He eats his worms and fruit but as soon as he is done he goes and buries himself again and stays there until next time I feed him. He doesnt swim, get sun or get water.He seems healthy but only stays on the surface for about 10 minutes until next feeding. Am I doing something wrong? What can I do to make him more active? His pen is outside so he can walk or get sun if he wants..If i put him on the grass ion the lawn he is fast and walks around the yard. Any suggestions?