Why Is My Crested Gecko Not Eating?
A crested gecko that turns its nose up at food is one of the most common worries new owners bring to forums and vet clinics alike. Before you panic, it helps to know that crested geckos are naturally light eaters compared to many other reptiles, and short appetite dips are common and usually harmless. That said, a gecko that refuses food for more than a week, or that's losing visible weight (check the tail base — it should stay plump), needs a closer look. The cause is almost always one of four things: temperature, diet, stress, or a life-stage event like shedding or brumation. Occasionally it's illness. Working through them in order will get you to the answer fast.
Start With the Enclosure Temperature
Temperature is the single most common culprit, and it's the easiest to rule out first. Crested geckos are a cooler-climate species — they do best in the 72-78°F range during the day, with a slight nighttime drop. Unlike bearded dragons or leopard geckos, they don't need intense basking heat, and an enclosure that runs too warm (above 82°F for extended periods) can suppress appetite just as much as one that's too cold.
- Use a digital probe thermometer placed at gecko height in the enclosure, not a stick-on dial gauge, which is often inaccurate by several degrees.
- Check the temperature at different times of day, especially in the evening when crested geckos are most active and most likely to eat.
- If your room runs hot in summer with no AC, that alone can shut down a gecko's appetite for days.
Check What (and How) You're Feeding
Most crested geckos today are fed a complete powdered diet (mixed with water into a paste) rather than live insects alone, and problems often trace back to how that food is prepared or offered rather than whether the gecko is hungry.
- Check the mix consistency and freshness. A paste that's too thick, too watery, or left out more than 24 hours can go unappealing or start to mold, and geckos are picky about both.
- Rotate flavors. Crested geckos can get bored of or develop an aversion to a single flavor over time. If you've fed the same formula for months, switching brands or flavors sometimes restarts interest immediately.
- Watch portion and dish placement. The food dish should be up on a ledge or the higher third of the enclosure — crested geckos are arboreal and often won't descend to a dish sitting on the substrate.
- Be cautious with feeder insects as a supplement. Crickets and dubia roaches are fine in moderation, but mealworms have a tough exoskeleton that's been linked to impaction, and insects too large for the gecko's head width are a choking and impaction risk. Gut-load and dust insects before offering them.
- Too much fruit puree or sugary treats can also cause loose stool and a temporary loss of interest in the regular diet, similar to a child filling up on dessert.
Rule Out Stress
Crested geckos are easily stressed by change, and a stressed gecko frequently stops eating until it settles. Common stress triggers include:
- A recent move to a new enclosure or a big rearrangement of an existing one
- Not enough hiding spots or foliage cover, leaving the gecko feeling exposed
- Being housed with another crested gecko (they're solitary and often don't tolerate tankmates well, especially two males)
- Excessive handling, especially in the first few weeks after bringing a gecko home
- Loud noise, vibration, or being kept somewhere with heavy foot traffic
If you've recently changed anything about the setup or handling routine, giving your gecko a week of minimal disturbance — food and water refreshed daily, but otherwise left alone — is often all it takes for appetite to return.
Normal Life Events That Reduce Appetite
Not every appetite dip is a problem to solve. Crested geckos naturally eat less during:
- Shedding. In the day or two before and during a shed, many geckos eat less. This resolves on its own once the shed is complete.
- Brumation. In cooler months, some crested geckos slow down and eat noticeably less even in a stable indoor enclosure, mirroring a mild seasonal response. This is normal in adult, healthy geckos and doesn't require intervention beyond making sure they stay hydrated.
- Breeding season changes. Gravid females in particular may eat less as they near laying, and males can go off food during periods of heightened activity.
When It's Time to See a Vet
Most appetite dips resolve within a few days to a week once the temperature, diet, or stress issue is corrected. This is not a substitute for professional care: contact an exotics-experienced reptile veterinarian if you notice any of the following, since these can point to parasites, a respiratory infection, or impaction that won't resolve with husbandry changes alone.
- No food intake for more than 10-14 days in an adult gecko (shorter for juveniles, who have far less fat reserve)
- Visible weight loss or a noticeably thin, shrunken tail base
- Lethargy, sunken eyes, or spending unusual amounts of time on the ground instead of climbing
- Diarrhea, straining, or a visibly swollen belly
- Any sign of respiratory trouble, like open-mouth breathing or clicking sounds
Juvenile and hatchling crested geckos have much smaller fat and energy reserves than adults, so don't wait as long before seeking help if a young gecko stops eating.
Getting the Setup Right From the Start
Almost every long-running "my gecko won't eat" case traces back to something set up incorrectly at the beginning — a thermometer in the wrong spot, a food dish placed where the gecko never goes, not enough cover, or not knowing what's actually normal for that gecko's age and morph. Crested geckos also vary a fair amount by morph and lineage in temperament, coloring changes, and typical activity patterns, and knowing what's normal for your specific gecko makes it much easier to tell a harmless dip from an actual problem. A solid reference that covers proper husbandry alongside morph identification can shortcut a lot of the guesswork that trips up new owners in those first few months.