It would be helpful to know which type of tortoise you have. Since they are small, try shredding different vegetables like carrots, squash, or sweet potato. You can try strawberries, raw corn, raw beans (lima, pinto, garbanzo, or mung), kale, collard greens, turnip greens, and romaine lettuce. Variety is key. Also, be sure you have a basking heat source and are providing UVA and UVB light sources.