Fluker's Tortoise Diet Large Pellet Formula is a specialized formula for all the larger species of dry land tortoises. The formula provides essential minerals and vitamins which are essential in maintaining a healthy immune system and proper shell development. The calcium and phosphorus ratio is balanced and the fiber content, required for intestinal mobility, is formulated to meet the needs of the animal. The vitamin A supplement helps prevent hypovitaminosis A, commonly diagnosed in animals offered less quality diets. The increased pellet size implements a more natural approach to feeding. The multicolored pellet combination mimics the animal's natural food choices and creates visual stimulation.