Feeding a blue-tongue skink: balancing an omnivore
Published by Planète Pets · managing editor: Clément Lacaille · how our guides are written
The blue-tongue skink is a hardy, popular lizard, but its omnivorous diet often confuses beginners used to insectivorous geckos. A dietary imbalance, too much protein or too little calcium, remains the leading cause of health problems in captivity. A review by Susan Donoghue, published in 1998 in Seminars in Avian and Exotic Pet Medicine, is a reference on the nutritional needs of pet reptiles and the central role of calcium and vitamin D3 (original study). All our feeding guides are gathered in the reptile food section.
Contents · 5 sections
What proportions in the bowl?
An adult eats roughly 50 % plant matter, 40 % animal protein, and 10 % fruit. Growing juveniles need more protein. You vary the sources: snails, insects, a little lean meat or quality dog kibble for protein; endive, dandelion, squash, and pepper for vegetables.
How often to feed?
- Growing juvenile: every day or every other day, with a higher protein share.
- Adult: two to three meals a week are enough, as the species gains weight quickly.
- Calcium supplement: regular dusting with calcium carbonate, essential under UVB lighting to prevent metabolic bone disease.
Foods to avoid at all costs
You ban wild-caught insects (pesticide risk), spinach and rhubarb (too many oxalates, which block calcium), toxic avocado, and any excess of sugary fruit that promotes obesity. Excess weight threatens this sedentary species, as our article on the blue-tongue skink setup and care points out.
Calcium, UVB, and digestion
Without UVB radiation, the skink does not synthesise vitamin D3 and cannot absorb calcium, however good the diet. Basking-zone temperature also drives digestion: too cold, and food ferments in the gut. So you make sure lighting and the hot spot are correct before even worrying about the menu.
Frequently asked questions
Can you give dog kibble to a blue-tongue skink?
Yes, occasionally and in small amounts, a quality rehydrated kibble provides protein, but it must never form the base of the diet, which stays mostly plant-based and varied.
My skink refuses vegetables, what should I do?
Mix the greens with an appealing prey item at first, then gradually cut the animal share; hunger and consistency usually win over even the fussiest.
Should I provide separate water?
Yes, a bowl of clean water at all times is essential, even though the animal draws part of its hydration from fresh vegetables. Find all our guides on the reptile hub.
An accessory from our shop for this use: Stick-on digital thermometer for aquarium and terrarium glass (€18.90) · the whole shop
This guide is part of Planète Pets’s Reptiles universe. Our advice is general in nature: for any health concern, your veterinarian remains the only reference.