Crested Gecko Not Eating: Causes & When to See a Vet
A crested gecko that stops eating for 1–2 weeks is often reacting to a husbandry problem — incorrect temperature, improper humidity, or stress — rather than acute illness. However, weight loss continuing beyond 2–3 weeks or signs of lethargy and sunken eyes require immediate exotic vet evaluation to rule out parasites, metabolic disease, or respiratory infection.
Last reviewed: June 2026
Why Is My Crested Gecko Not Eating?
Crested geckos (Correlophus ciliatus) are relatively hardy lizards but are sensitive to environmental conditions. Short fasting periods of 1–2 weeks are common and often benign — most crested geckos refuse food during shedding, breeding season, or immediately after a change in environment. However, extended fasting (beyond 2–3 weeks) combined with weight loss signals a husbandry problem or health issue that requires attention. As described in Mader's Reptile and Amphibian Medicine and Surgery, nutritional and husbandry problems account for the majority of disease presentations in captive reptiles, making a thorough environmental review the essential first diagnostic step. The ARAV Reptile & Amphibian Resources, 2024 recommend that owners perform a systematic cage audit before seeking veterinary care for a non-eating gecko — resolving the environmental cause is usually faster and cheaper than diagnostic testing.
Common Causes of Crested Gecko Not Eating
Husbandry-related (most common):
- Temperature too high: crested geckos thrive at 72–78°F (22–26°C) during the day. Temperatures above 82°F (28°C) cause stress and appetite suppression — they are one of the few reptiles that can die from heat, not cold. Check with a digital thermometer placed at gecko level.
- Humidity imbalance: ideal is 60–80% humidity with a dip to 40–50% between misting cycles to allow drying. Constantly wet environments promote respiratory infections; constantly dry environments cause dehydration and anorexia.
- Shedding: most crested geckos fast for 1–5 days during and immediately after a shed. Look for dull, grey skin tone as the shed approaches.
- Breeding season: male crested geckos (and sometimes females) reduce food intake during breeding season (typically late spring through summer).
- New environment: geckos recently moved to a new enclosure typically fast 1–2 weeks while acclimating.
- Stress: overhandling, visible predator threats (dogs/cats staring at the tank), high-traffic cage locations.
Health-related (require vet evaluation):
- Intestinal parasites: pinworms and protozoa (Coccidia, Cryptosporidium) commonly cause chronic anorexia and wasting in wild-caught or feeder insect-exposed crested geckos.
- Metabolic bone disease (MBD): calcium and vitamin D3 deficiency causes jaw weakness, making feeding difficult; deformed jaw or limb tremors point to MBD.
- Respiratory infection: wheezing, open-mouth breathing, and mucus around the nares indicate URI, which causes appetite loss.
- Retained shed: constricted shed on toes or the tail tip causes pain that suppresses eating.
- Internal abscess or reproductive disease: female geckos may become anorexic from follicular stasis (egg retention without a male).
Assessment: What to Check First
- Measure cage temperature at gecko level — both warm and cool zones
- Measure humidity with a digital hygrometer at multiple times of day
- Check for incomplete shed on toes, eyes, or tail tip
- Weigh the gecko weekly — a digital kitchen scale works. A 45–65g adult losing more than 5% of body weight per month is a clinical concern.
- Examine droppings for diarrhea, mucus, or abnormal color
When to See a Vet
Call your vet today if:
- Your crested gecko has not eaten for more than 3 weeks despite correct husbandry
- The gecko is losing visible body mass (ribs or hip bones prominent)
- Eyes appear sunken or the gecko looks dehydrated
- You notice retained shed on toes, tail tip, or around the eyes
- Any wheezing, mucus, or labored breathing accompanies the anorexia
Go to the ER immediately if:
- Your gecko is limp, unresponsive, or cannot right itself
- The jaw appears deformed or soft (MBD crisis)
- Temperature in the enclosure exceeded 85°F for a prolonged period
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Frequently Asked Questions
How long can a crested gecko go without eating? Healthy adult crested geckos can fast for 2–3 weeks without significant consequence — wild geckos may not eat daily. However, juveniles (under 6 months) have less energy reserve and should be evaluated if fasting exceeds 7–10 days. Any gecko losing visible weight is a concern regardless of duration.
Should I force-feed my crested gecko? Not without veterinary guidance. Force-feeding an anorexic gecko without knowing the cause can worsen stress and even cause aspiration. Offer Repashy Crested Gecko Diet (CGD) — a complete powder-based food — on a bottle cap placed at gecko level nightly and remove it in the morning. If the gecko is not consuming it after 3 weeks, vet evaluation is warranted.
What does crested gecko not eating vet visit cost? Exotic vet exam: $75–150. Fecal parasite exam: $50–80. Full blood panel: $150–300. Radiographs to assess follicular status or MBD: $150–300. Parasiticide treatment if indicated: $30–80. Total: $300–800 for a typical diagnostic workup.
Does temperature affect crested gecko appetite? Yes — crested geckos are particularly heat-sensitive. Above 80°F they become stressed; above 85°F is dangerous. Below 65°F they may also slow down and eat less. The ideal daytime temperature of 72–78°F is the single most common husbandry fix for anorexia.
How do I get my crested gecko to eat Repashy CGD? Offer CGD fresh nightly in a small shallow dish, mixed to the consistency of applesauce. Place it where the gecko forages (elevated, near perches). Try different flavors — Watermelon, Mango Superblend, and Fig & Insects are commonly accepted. Some geckos prefer to lick from a spoon or the side of a jar. Hunger over a few days usually overcomes food aversion.
Still Not Sure if Your Crested Gecko Needs a Vet?
When you're not sure if this is wait-and-see or call-tonight, Voyage AI Vet triages in under 2 minutes. Describe what you're seeing in chat, share photos of your gecko's body condition, enclosure setup, and the food you're offering, or hop on a live video call if you want a second pair of eyes. Every answer comes with citations to the actual veterinary literature it's pulling from — so you see exactly where the guidance comes from, not just a chatbot's word.