Pet tortoises have specific nutritional requirements to stay healthy. They need a diet that is high in fiber, low in protein, and rich in calcium. A balanced diet for a pet tortoise includes dark leafy greens, vegetables, fruits (in moderation), and occasionally small amounts of protein sources like insects. It's important to provide a variety of foods to ensure they get all the necessary nutrients. Additionally, providing a calcium supplement and access to natural sunlight or UVB lighting for proper calcium absorption is crucial for their shell and bone health. Make sure to research the specific dietary needs of your tortoise species as they can vary.