Crested Gecko Not Eating

Crested geckos are crepuscular-to-nocturnal arboreal animals that come down from the canopy to feed at dusk rather than basking and grazing through the day the way many diurnal lizards do, so a keeper checking the food dish at noon and finding it untouched isn't necessarily seeing a problem — the gecko simply hasn't been active yet. A realistic check is at night, an hour or two after lights-out, watching from a distance for the gecko to approach the dish.

Because most keepers now feed a commercial complete gecko diet (CGD) as the dietary backbone rather than the older insects-plus-fruit-plus-calcium-dusting routines, appetite loss in this species often has a different first suspect list than it does in insectivore lizards: how the powder was mixed, how long it sat out, and whether it was placed somewhere the gecko actually patrols. A too-thick paste can skin over and become unappealing within hours in a warm room, and a too-thin mix can separate and lose the texture that triggers a feeding response.

Temperature deserves more weight in this species than in almost any other commonly kept reptile. Correlophus ciliatus evolved in the cooler, shaded understory and canopy of New Caledonia's forests, not on open, sun-baked ground, and its thermal tolerance reflects that: keepers and rescue organizations have documented losses at sustained temperatures in the mid-to-high 80s°F, a range that would be unremarkable basking-zone territory for a bearded dragon. Appetite suppression is one of the earliest, mildest signs that an enclosure is running warmer than this gecko is built for, well before heat stress becomes an emergency.

A short pre-shed fast is normal and self-limiting — the animal's attention and behavior visibly shift toward shedding for a day or two, then feeding resumes once the old skin is off and, ideally, eaten (crested geckos routinely consume their shed skin, which is normal and not something to worry about). Persistent refusal that outlasts a shed cycle by a week or more is the point to start treating it as a genuine problem rather than a phase.

Picky or one-time refusal of a particular CGD flavor is common and worth distinguishing from a general appetite problem. Many keepers rotate between two or three reputable flavors/formulas specifically because an individual gecko can lose interest in a single flavor over months even while remaining perfectly healthy, and the fix there is variety rather than a health workup. What separates ordinary flavor fatigue from a real problem is whether the gecko readily takes a different formula, live insects, or overripe fruit puree offered as a one-off test — genuine illness-driven anorexia tends to refuse everything, not just the usual dish.

Newly imported or newly acquired geckos, and juveniles freshly split from a clutch, are a special case worth handling gently: both groups can take one to several weeks to begin reliably feeding in a new setup even when husbandry is correct, simply from the stress of transition. Patience paired with the temperature and hydration checks above, rather than immediate escalation to a vet visit, is usually the right first response for a gecko that's otherwise bright, alert, and gripping normally.

A gecko that continues eating but noticeably less than its established baseline is a different situation than one that has stopped entirely, and generally warrants a calmer, more gradual troubleshooting approach — checking temperature and CGD freshness over a week or two — rather than the more urgent response appropriate for total, sustained refusal in a gecko that's also showing weight loss or lethargy. Distinguishing these two patterns rather than treating every appetite dip identically helps calibrate how quickly to escalate to veterinary care.

Keep the warm side of the enclosure well within this species' comfort range and monitor with a digital probe thermometer placed at gecko height, not at the substrate or the glass

Mix CGD fresh every one to two days rather than topping up an old puddle, and place it on an elevated ledge in the animal's regular travel path

Handle minimally during the settling-in period after any housing change, and keep a simple weight/feeding log so a gradual decline is caught early rather than after weeks

Rotate between two or three reputable CGD flavors over time to reduce the odds of flavor fatigue being mistaken for a health issue

Give newly acquired or newly split juvenile geckos a genuine settling-in period before treating slow initial feeding as cause for alarm