Quick Answer
If you are wondering why is my leopard gecko not eating, the most common cause is cold tank temperatures. Leopard geckos need a basking surface of 88-93°F to digest their food. When the tank is too cold, their metabolism slows down and they refuse meals. Other common reasons why is my leopard gecko not eating include shedding, stress, impaction, and illness.
Why Is My Leopard Gecko Not Eating?
If you are asking why is my leopard gecko not eating, you are not alone. In my experience, most cases have a straightforward environmental cause that you can fix at home.
Common Reasons
1. Incorrect Tank Temperature
This is by far the most common reason why is my leopard gecko not eating. Leopard geckos are ectothermic — they rely on external heat to digest food. If the basking area is too cold, their digestive system essentially shuts down, and eating would cause food to rot in their stomach. So they simply refuse to eat.
The ideal temperature setup:
| Zone | Temperature |
|---|---|
| Warm basking area | 88-93°F |
| Cool side | 75-80°F |
| Nighttime low | No lower than 65°F |
Signs temperature is the problem:
- Your gecko spends all its time on the cool side and avoids the warm area
- The gecko is sluggish and slow-moving
- Feeding response is weak or absent even with favorite insects
When temperature is the answer to why is my leopard gecko not eating, the fix is straightforward. Use a JEDEW digital thermometer 2-pack to measure both the warm and cool sides accurately. If the warm side is below 88°F, adjust your heat source. Connect your heat mat to a BN-LINK reptile thermostat to maintain a consistent temperature around the clock. Temperature issues are the leading cause of why is my leopard gecko not eating, so resolving them often fixes the problem immediately. For more on setting up the right environment, see our leopard gecko care guide.
2. Shedding
Leopard geckos eat their shed skin for nutrition, and during the shedding process they often go off food for a few days. If your gecko is shedding, that could explain why is my leopard gecko not eating right now. Shedding is one of the most harmless reasons why is my leopard gecko not eating — it resolves on its own. The shedding cycle typically lasts 3-7 days, and reduced appetite during this window is completely normal.
Signs shedding is the cause:
- Skin appears dull or grayish, especially on the body and tail
- The gecko rubs against decor to peel off old skin
- Less active but otherwise alert
What to do: Provide a moist hide — a small container with damp sphagnum moss or paper towels. Most geckos resume eating within a day or two after the shed is complete. If shedding is the reason why is my leopard gecko not eating, patience is all that is needed. If shed skin gets stuck on the toes, give your gecko a shallow warm soak for 10-15 minutes.
3. Stress
Stress is another frequent answer to why is my leopard gecko not eating. Geckos are particularly sensitive to environmental changes. If you recently moved the tank, changed the decor, added a new tank mate, or handle your gecko too frequently, stress is a likely culprit.
Common stress triggers:
- A new tank or recent move
- Excessive handling, especially in the first weeks
- Bright lights or constant daytime lighting
- Loud noises or vibrations near the enclosure
What to do: Reduce handling to once per week for 2-3 minutes maximum. Ensure the tank has at least two hides — one on the warm side and one on the cool side. Keep the room quiet and dim. Identifying whether stress explains why is my leopard gecko not eating requires looking at recent changes. If stress is the reason why is my leopard gecko not eating, most geckos begin eating again within 5-7 days of consistent, low-stress conditions. A properly sized leopard gecko terrarium makes a significant difference in reducing stress.
4. Impaction
Impaction occurs when your gecko swallows substrate that blocks the digestive tract. This is most common with loose substrates like sand or gravel. If your gecko is impacted, that explains why is my leopard gecko not eating — it physically cannot pass food through its system.
Signs of impaction:
- Swollen or bloated belly
- No feces for 5 or more days
- The gecko may regurgitate food
- Hind legs appear stiff or the gecko drags them
What to do: If you suspect impaction and why is my leopard gecko not eating has been going on for days, switch to paper towels or reptile carpet immediately. Give your gecko a warm soak in shallow water (85-88°F) for 15-20 minutes. Massage the belly gently. If your gecko does not pass stool within 24-48 hours, see an exotic vet. When impaction is the cause of why is my leopard gecko not eating, veterinary treatment is often needed.
5. Nutritional Deficiency
Metabolic bone disease, caused by calcium and vitamin D3 deficiency, can lead to loss of appetite. If you have been wondering why is my leopard gecko not eating and your gecko also has weak limbs or a soft jaw, nutritional deficiency could be the reason. This usually develops gradually over weeks or months, which is why why is my leopard gecko not eating due to deficiency can be hard to notice at first.
Signs of nutritional deficiency:
- Soft, rubbery jaw or limbs
- Tremors or muscle twitches
- Curved or deformed spine
- Loss of tail fat reserves
What to do: Dust feeder insects with a quality calcium supplement containing vitamin D3 at every feeding. Zoo Med Reptile Calcium with D3 provides both calcium and the D3 needed for absorption. Use a separate multivitamin supplement like Zoo Med Reptivite once or twice a week to cover vitamins A, B, and other trace minerals. Our guide to the best crested gecko supplements covers supplement options that also work well for leopard geckos.
6. Illness or Parasites
Internal parasites, respiratory infections, and mouth rot can all explain why is my leopard gecko not eating.
Signs of illness:
- Watery, unusually smelly, or discolored feces
- Bubbles from the nose or clicking sounds when breathing
- Sunken eyes and wrinkled skin
- Weight loss despite being offered food regularly
What to do: If illness is the answer to why is my leopard gecko not eating, do not wait. Collect a fresh fecal sample and take it to an exotic vet. A simple fecal test can identify parasites quickly. Most parasitic infections are treatable with prescribed medication.
7. Brumation
Brumation is a natural slowdown period that some leopard geckos enter during cooler months. Not all leopard geckos brumate — it depends on their genetics and the temperature cycle in their enclosure. If your gecko is healthy and temperatures have dropped, brumation could be the reason why is my leopard gecko not eating.
Signs of brumation:
- Reduced appetite over several weeks, not suddenly
- Spending more time in the hide
- Less active but still alert when handled
What to do: Keep the cool side around 70°F and offer food once a week. Do not force-feed during brumation. If you are new to leopard geckos and asking why is my leopard gecko not eating, brumation can be surprising. When brumation explains why is my leopard gecko not eating, the best approach is to let nature take its course. Keep fresh water available at all times.
How to Get Your Gecko Eating Again
When figuring out why is my leopard gecko not eating, start with the simplest fix first. The solution is usually direct:
- Fix the temperature first — this resolves most cases of why is my leopard gecko not eating. Measure both zones with a digital thermometer
- Offer a variety of insects — crickets, dubia roaches, mealworms, and hornworms
- Use an appetite stimulant — Fluker’s Repta Boost is a high-calorie supplement you can syringe-feed to a gecko that has not eaten in over a week. Mix a small amount with water and offer it from the tip of a feeding syringe
- Reduce stress — if stress is behind why is my leopard gecko not eating, dim the lights, limit handling, and ensure proper hides are available
- Check for stuck shed — a gecko with retained skin on its face may not be able to see its food
If your gecko has not eaten anything in 10-14 days and none of the above steps resolve why is my leopard gecko not eating, schedule a vet visit. For keepers with other gecko species, our guides on crested gecko not eating and ball python not eating cover species-specific troubleshooting.
When to See a Vet
If you have addressed the environmental causes and are still wondering why is my leopard gecko not eating, the table below will help you decide when professional help is needed.
| Symptom | Urgency | Timeline |
|---|---|---|
| Not eating + swollen belly | High | Vet within 48 hours |
| Not eating + weight loss | High | Vet within 48 hours |
| Not eating + sunken eyes | High | Vet within 24 hours |
| Not eating + regurgitation | High | Vet within 48 hours |
| Not eating but otherwise healthy | Low | Monitor for 10-14 days |
| Not eating during shed | Low | Normal, wait for shed to complete |
Recommended Products
BN-LINK Reptile Thermostat A thermostat is the single most important piece of equipment for maintaining proper temperatures. It regulates your heat mat or heat tape to keep the basking area in the correct range. When investigating why is my leopard gecko not eating, temperature is always the first thing to check. See our best reptile thermostat guide.
JEDEW Digital Thermometer 2-Pack These thermometers stick to the tank wall and show both temperature and humidity. Using two lets you monitor both sides simultaneously. Temperature drift is one of the most overlooked causes of why is my leopard gecko not eating.
Zoo Med Reptile Calcium with Vitamin D3 Calcium with D3 prevents metabolic bone disease, which can cause appetite loss. Dust insects before every feeding.
Fluker’s Repta Boost This high-calorie supplement is for reptiles that have stopped eating. Mix with water and offer via syringe. It can provide critical nutrition while you address the underlying cause of why is my leopard gecko not eating.
Zoo Med Reptivite A multivitamin and mineral supplement. Use once or twice a week in rotation with your calcium supplement.
Frequently Asked Questions
These are the most common questions owners ask when wondering why is my leopard gecko not eating.
Why is my leopard gecko not eating crickets but eating worms? When the question why is my leopard gecko not eating only applies to certain insects, this is fairly common and usually not a concern. Some geckos develop preferences for certain prey. As long as your gecko is eating something and maintaining its weight, there is no need to worry. Continue offering variety.
How often should I feed my leopard gecko? When figuring out why is my leopard gecko not eating, feeding schedule matters. Adults need feeding every 2-3 days, while babies and juveniles need daily feeding. Offer 5-7 appropriately sized insects per feeding for adults. The general rule: do not offer insects larger than the space between your gecko’s eyes.
Why is my leopard gecko not eating and hiding all the time? This combination almost always points to stress or illness. Check your temperatures first. If those are correct, consider recent changes. If nothing has changed and the behavior persists for more than a week, a vet visit is warranted.
Can I leave crickets in the tank overnight? I would not recommend it. Uneaten crickets can bite your gecko while it sleeps. Remove any uneaten insects after 15-20 minutes. If your gecko consistently does not eat the crickets, try a different prey type like dubia roaches or hornworms.
Why is my leopard gecko licking its lips but not eating? If your gecko shows interest but still will not eat, temperature may explain why is my leopard gecko not eating. Lip-licking can signal interest in food. If your gecko licks the air near prey but does not strike, the prey may be too large, too fast, or the gecko may not be warm enough to hunt. Warm the tank to 90°F and try slower-moving prey like mealworms.