Leopard gecko not eating: temperature, shedding, or impaction?
Start with the thermometer. A leopard gecko that is not eating is usually too cool to digest, mid-shed, or briefly off food in winter, and a warm surface around 31 to 34C / 88 to 93F on the hot end restores appetite in many cases. Book a reptile vet if refusal lasts beyond about two weeks in an adult, if a juvenile skips more than a few days, or straight away for weight loss, a thinning tail, no droppings for over a week with a swollen belly, straining, retained shed on the toes or eyes, or open-mouth breathing.
Written by the PetLumen editorial team. Not reviewed by a veterinarian. Unsure how urgent this is? Work through the free urgency checker.
This page is general pet health information, not a diagnosis or treatment plan for your pet. Always confirm anything urgent with a licensed veterinarian.
What to do in the next hour
- Measure the warm end and cool end with a probe thermometer and write both numbers down.
- Weigh your gecko on a gram scale and compare with your last recorded weight.
- Photograph the tail from above, since the tail base is where reserves show.
- Check for retained shed on the toes, tail tip and eyes.
- Call a reptile vet now for open mouth breathing, straining, a firm swollen belly, tremors or a rubbery jaw.
- Offer a shallow warm soak and fresh water, then leave your gecko undisturbed in a warm hide.
One week, one month, two months without food
Duration matters, but weight matters more. Read the row you are in.
| How long | What it usually means | What to do |
|---|---|---|
| Up to one week, adult | Common during a shed, a cool spell, a move or winter | Check the gradient, weigh, keep offering food |
| Up to one week, juvenile | Juveniles have far less reserve | Vet this week |
| Around one month, weight steady | Often husbandry or seasonal, tail still full | Vet visit for an exam and a faecal check |
| Around one month, weight falling | Not a normal fast | Vet within days |
| Two months or more | Too long whatever the scale says | Vet appointment, with imaging and bloods likely |
| Any duration with a thinning tail | Reserves are being used up | Vet within days |
| Preferred temperature zone | 77 to 86 degrees Fahrenheit, 25 to 30 Celsius | Fix this before anything else |
When to see a vet today
See a vet today if you notice A tail that is visibly thinning, or fast weight loss on the scales, No droppings for over a week with a firm, swollen belly, or visible straining, and Open-mouth breathing, bubbles at the nostrils, or wheezing. These are the signs that should not wait for home care or a watch-and-see approach. If any of them appear, skip the rest of this guide and call your vet or an emergency clinic now - waiting is the risky option.
- ●A tail that is visibly thinning, or fast weight loss on the scales
- ●No droppings for over a week with a firm, swollen belly, or visible straining
- ●Open-mouth breathing, bubbles at the nostrils, or wheezing
- ●Sunken eyes, wrinkled skin, or a gecko that will not right itself
- ●Retained shed tight around toes, tail tip or eyes
- ●Jaw that looks soft or rubbery, tremors, or a juvenile refusing food for several days
Safe to monitor at home
Milder signs are usually safe to watch for a day or two: A few days off food with cloudy, dull skin just before a shed, then eating again, A slightly reduced winter appetite in a well-weighted adult with a fat tail, and Turning down one insect type while still taking others, at a stable weight. Keep notes and photos so you can spot a trend. Anything that worsens, spreads, or comes with appetite, energy or behavior changes moves out of this category and into a vet visit.
- ●A few days off food with cloudy, dull skin just before a shed, then eating again
- ●A slightly reduced winter appetite in a well-weighted adult with a fat tail
- ●Turning down one insect type while still taking others, at a stable weight
What to photograph or record
Photograph or record Photograph your thermometer or probe readings at the warm end and the cool end, Photograph the whole enclosure, including the heat source, thermostat and substrate, and Photograph the gecko from above and from the side so the tail thickness shows in good, even light. Clear, well-framed evidence is what lets a vet - or a PetLumen scan - judge the change instead of guessing from a description. The checklist below is the exact shot list.
- Photograph your thermometer or probe readings at the warm end and the cool end
- Photograph the whole enclosure, including the heat source, thermostat and substrate
- Photograph the gecko from above and from the side so the tail thickness shows
- Weigh your gecko in grams and write the number and date down each week
- Photograph the most recent dropping, and note the exact date of the last meal and last shed
Likely causes
The causes vets consider first for this presentation are temperatures too low, shedding, brumation or seasonal slowdown, and impaction. Most are manageable once identified, but they look similar from the outside, which is why a photo-based triage and, when needed, an exam matter more than guesswork.
Temperatures too low
The most common reason by far. Without a warm surface of roughly 31 to 34C / 88 to 93F under the belly a gecko cannot digest, so it stops trying. Check with a probe, not a guess.
Shedding
Dull, grey skin and a few days of refusal are normal around a shed. Retained skin on toes, tail tip or eyes afterwards is not, and needs help.
Brumation or seasonal slowdown
Some adults eat less in winter as day length drops. It is only acceptable in a gecko holding weight with a full tail, and weekly weighing is how you know.
Impaction
Loose particulate substrate, oversized insects and cool temperatures can block the gut. A swollen belly, straining and no droppings mean a reptile vet now.
Metabolic bone disease
Too little calcium or D3 leads to tremors, a rubbery jaw and weakness. It is preventable with correct supplementation and needs veterinary treatment once present.
Parasites or infection
Runny, smelly droppings, weight loss despite eating, or mouth and respiratory signs point to disease. A faecal test is quick and answers a lot.
Safe home care
For mild cases, safe home care is verify warm-end and cool-end temperatures with a digital probe before changing anything else, check the thermostat is working and the heat mat or lamp covers only part of the floor, and offer a humid hide with damp moss to help a stuck shed, and shallow fresh water always available. These steps comfort and monitor; they do not treat the underlying cause. Stop home care and call a vet if anything in the urgent list above appears or the trend moves the wrong way.
- -Verify warm-end and cool-end temperatures with a digital probe before changing anything else
- -Check the thermostat is working and the heat mat or lamp covers only part of the floor
- -Offer a humid hide with damp moss to help a stuck shed, and shallow fresh water always available
- -Weigh weekly and log it, because the trend decides how urgent this is
- -Do not force-feed, do not use vitamin pastes or oils, and do not bath a struggling gecko without veterinary advice
- -Do not offer insects larger than the space between the eyes, and avoid loose particulate substrate while appetite is off
PetLumen is a triage and monitoring tool, not a substitute for veterinary care. Always confirm treatment plans with a licensed veterinarian.
When it is not an emergency
Not every worrying sign needs an out-of-hours visit. These situations are usually safe to watch at home, as long as eating, drinking and droppings stay normal and nothing in the urgent list above appears.
- ●A few days off food around a shed, with a full tail and steady weight
- ●Reduced winter appetite in an adult that is holding weight and behaving normally
- ●Refusing one prey type while taking another, with stable weight
- ●A week of poor appetite after a move, recovering once the enclosure is settled and correctly heated
Frequently asked
How long can a leopard gecko go without eating?
A healthy adult with a fat tail can go a couple of weeks, especially around a shed or in winter, and still be fine. A juvenile has far smaller reserves and should not skip more than a few days. Weight and tail thickness matter more than day count, so weigh weekly.
What temperature does a leopard gecko need to digest food?
Aim for a warm surface of about 31 to 34C / 88 to 93F on the hot end with a cooler end available, controlled by a thermostat and measured with a probe rather than a stick-on dial. Too cool and food sits undigested, which is the single most common reason for refusal.
Is my gecko brumating or ill?
Brumation should look like a calm, well-weighted gecko that is simply less interested in food as the days shorten. Weight loss, a thinning tail, sunken eyes, no droppings or lethargy are not brumation. If the scales are heading down, treat it as illness and book a reptile vet.
How do I know if my gecko is impacted?
Suspect it when droppings stop for more than a week, the belly looks firm or swollen, or your gecko strains without producing anything. Loose sand-type substrate and cool temperatures raise the risk. It needs a reptile vet rather than home remedies, and imaging is often how it is confirmed.
Related signs to watch
Sources
Every hour, temperature, weight and dollar range on this page traces to one of the veterinary references below. Where a number could not be traced to a named source, it was left out rather than estimated.
- -MSD Veterinary Manual - Important Husbandry Requirements for Selected Reptiles
- -Franco et al, The lifestyle of the leopard gecko and the importance of ultraviolet radiation, vitamin D and calcium, Veterinarska Stanica 2023
- -LafeberVet - Metabolic Bone Disease in Reptiles and Amphibians
- -LafeberVet - Clinical Medicine of Bearded Dragons
Last edited 2026-09-22. First published 2026-08-26. Written by the PetLumen editorial team and not reviewed by a veterinarian.
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