Food guide
Turtles food: the complete PetFoodRate 2026 guide
Tortoise and turtle nutrition depends entirely on the species. Mediterranean tortoises (Hermann, Greek, Marginated) are strict herbivores needing fiber-rich, low-protein, high-calcium diets. Aquatic turtles (red-eared slider, painted turtle) are omnivorous when young and shift to herbivorous as adults. Box turtles are true omnivores. The most common deadly mistake is feeding cat food, dog food, or commercial pellets designed for fish. PetFoodRate currently grades tortoise diets from professional zoo lines like Mazuri, with more species coverage planned.
What to look for
- High fiber content (minimum 18 percent for herbivorous tortoises)
- Optimised calcium-to-phosphorus ratio (2:1 or higher for shell health)
- Vitamin D3 added (essential if the tortoise gets limited UVB exposure)
- Hay-based or grass-based formulations for adults
What to avoid
- Cat food, dog food, or fish pellets (wrong protein and mineral profile)
- High-protein diets for herbivorous species (causes pyramiding and kidney damage)
- Lettuce iceberg, tomatoes, fruit in large quantities (low calcium)
- Pellets without vitamin D3 if your tortoise has no UVB lamp
Our PetFoodRate top 5 turtles
- #1 A Mazuri Tortoise Diet 86/100 seeds and pellets
Selections by type for turtles
Recommended brands for turtles
Frequently asked questions
What do Hermann tortoises eat in the wild?
Wild Hermann tortoises browse on a wide variety of weeds, wild grasses, and flowers: dandelion, plantain, clover, vetch, hibiscus, mallow, sow thistle. They occasionally eat small insects, snails, and dried droppings, but the bulk of their diet is fibrous plants. Captive diets should mimic this with weeds, grass-based pellets like Mazuri, and limited fruit.
Can I feed my tortoise lettuce?
Iceberg lettuce is mostly water and provides almost no nutrition - avoid it. Romaine and butter lettuce are better but should be a small part of the diet, not a staple. The best leafy greens for tortoises are kale, dandelion greens, mustard greens, collard greens, and fresh weeds from a pesticide-free garden.
How important is calcium for turtles?
Critical. Calcium builds the shell and bones, and a deficiency causes metabolic bone disease (MBD), one of the most common reptile illnesses in captivity. Provide a cuttlebone in the enclosure, dust food with calcium powder twice a week, and offer high-calcium foods like dandelion and kale. Vitamin D3 (from UVB exposure or diet) is required for calcium absorption.
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