Pet iguanas have specific nutritional requirements that must be met in order to keep them healthy. They are primarily herbivores and need a diet rich in leafy greens, such as collard greens, mustard greens, and dandelion greens. They also require vegetables like squash, bell peppers, and carrots. It's important to provide calcium and vitamin supplements to prevent deficiencies. Additionally, iguanas need access to clean water at all times. Avoid feeding them animal proteins, as they can be harmful to their health.