Complete Guide to Turtle and Tortoise Diets in 2025

Once you adopt any pet, you are the source of nearly everything they need to survive, and food is one of the most vital. With Chelonia and their slow growth rate and relatively small food requirements, a good quality diet is the most important. Poor diet can lead to malformed bones, including their shell, eyesight loss, organ damage and failure, and death. Dietary-related disorders are the main cause of mortality in hatchlings and juveniles in captive bred circumstances. However, with a bit of research and prior planning, it’s not that hard to provide them with a good diet that will help them to live a long and healthy life.

Turtles and tortoises have been evolving for 200 million years, so many species have developed to feed in particular ecological niches. Your first reference for your animal’s diet should always be what they would have access to in the wild. Tortoises and semi-aquatic turtles will have access to various plants and fruits, as well as molluscs, insects, worms, and for some species, carrion. Aquatic and semi-aquatic turtles will access aquatic molluscs, aquatic plants and weeds, fish, larvae and fallen fruit. Some turtles even hunt birds and small mammals available to them.

Tortoise and Turtle Diet Overview

Tortoise Diet: Most tortoises are primarily herbivores, feeding mainly on leafy greens, grasses, leaves and flowers. Some species, like Red and Yellow-footed tortoises, include some animal matter, making them omnivorous. It’s important to feed them plants that replicate their natural diet in the wild. Feeding frequency should be daily or twice daily for hatchlings and young tortoises, with adults fed daily or occasionally with a rest day. Amounts should support steady, slow growth to avoid health problems such as shell deformities.

Turtle Diet: Turtles are generally omnivorous, consuming both animal protein and plants. Aquatic turtles commonly eat specially formulated commercial pellets as staple food, supplemented with dark leafy greens, vegetables, insects like crickets or mealworms, and feeder fish. Feeding frequency is usually daily pellets, vegetables several times per week, and insects or feeder fish once a week. Young turtles require daily feeding rich in protein and vitamins to support their development. Variety in diet is crucial to prevent nutritional deficiencies. Fruits can be offered occasionally as treats but should not be a dietary mainstay.

Commercial Foods and Supplements

There are many commercially prepared foods for turtles and tortoises, but quality varies significantly. For turtles, look for pellet foods with suitable protein content for the species and age. Some turtles benefit from additional koi wheat germ supplements. Cat or dog food biscuits are sometimes fed but remain a debated choice among keepers and vets. For many tortoises, additional pellet foods may not be necessary if a varied herbivorous diet is provided.

Vegetable and Plant Matter

Vegetables and greens supply fibre and essential macronutrients, primarily calcium for species like tortoises. A correct calcium-to-phosphorous ratio is vital for healthy bone and shell development. Variety is key: you can differentiate greens into aquatic and terrestrial categories.

• Aquatic plants such as duckweed and Elodea species can be grown separately and added to turtle enclosures.
• Terrestrial greens like dandelions (dandelions), clover, sow thistle, plantains, vetches, trefoils, mallows, bindweed, sedums, honeysuckle, chickweed, and bramble shoots provide diverse nutrition. Dandelions, for instance, can be grown in alkaline soil enriched with mineral dressing such as calcified seaweed to address mineral deficiencies common in captive diets.

Grass-eating species benefit from enclosure-grown grass and hay when fresh grass isn’t available. Always ensure plant material is collected from areas well away from roadways to avoid contamination by toxins or chemical sprays such as herbicides and pesticides, which may only show effects weeks later.

Live Food

Insects: A wide variety of live insects can be sourced from pet shops. These are most nutritious when gut loaded, meaning fed healthy diets before being offered to your pet turtle or tortoise.

Worms: Commonly sold larvae and earthworms can be gut loaded too and provide a valuable protein source especially for omnivorous turtles.

Earthworms and invertebrates can be sourced from fishing bait, compost worms or garden collection but should be maintained in wormeries and fed properly for consistent food supply.

Fish: While some wild turtles eat fish, feeding live fish to pet turtles is generally discouraged due to legal and ethical concerns and potential toxins such as substances found in goldfish that can accumulate in turtles and cause health problems.

Fruit and Vegetables as Treats

The majority of turtles and tortoises cannot digest sugars in fruits and many vegetables. Unless your species specifically requires fruit, it should only be offered occasionally as a treat. Tropical forest floor species that encounter fallen fruit can have moderate fruit in their diet. Foods like bananas and squash may have laxative effects on some species and should be used cautiously.

Promoting Responsible Pet Care

Before introducing any new food, research your specific turtle or tortoise species' natural diet and try to replicate it as closely as possible. Providing a varied and balanced diet is key to preventing nutritional deficits and common illnesses. Always source food and supplements ethically and responsibly, avoiding foods or plants harmful to your pet. Regular health checks by a vet specialising in reptiles are crucial to ensure dietary plans meet your pet’s evolving needs.

Summary Table: Key Dietary Differences