My pet stars, Rafael & Splinter had died. I had them for 4 years. Don't know what happened.....I kept them indoor. Last week, Rafael's shell was very soft. I fed him vitamins and made sure he had afternoon sunlight in the house. He seemed to get better....shell was getting harder but there was a tear on his lower jaw. At the same time, Splinter was not eating but he was heavy and his shell was hard and good. Yesterday, I put them in the garden.....hoping natural sunshine would do them good. They were under the sun for awhile, then I put them under the shade of trees. When I brought them into the house, Rafael was dead. His head and limbs were out (not hidden in his shell). This morning, Splinter had died too. Same....head and limbs were out....sort of hardened. Can someone tell me what happened? Why my tortoises had short lives?