My Hermann Tortoise's shell has all of a sudden gone completely soft and caved in slightly, she has also stopped eating as much....she has always eaten her cuttle fish bone and egg shells, she also has a large UV light on her for at least 12 hours per day and lives inside...please help she is only 2 years old and tiny still. She has a healthy diet of dandylion leaves, strawberries and various lettuce leaves, I feed her around 4 times per week.