Adult Crested Gecko Feeding Guide: Schedule, Portions, and Staple Foods

Adult crested geckos are omnivores, but in captivity they usually do best when the foundation of the diet is a commercially prepared, nutritionally complete crested gecko food mixed fresh with water. These diets are designed to provide balanced protein, vitamins, and minerals in a way that fruit alone cannot. For most healthy adults, this staple food matters more than chasing variety.

A good routine is to offer food at night, since crested geckos are nocturnal. Many adults eat well on an every-other-day schedule, though some active geckos maintain weight with slightly more frequent offerings and some heavier geckos do better with a little less. What matters most is not a rigid calendar. It is steady body condition, normal stools, good shedding, and a consistent appetite.

Live insects can still play a useful role. They provide enrichment, movement, and extra protein, especially for geckos that enjoy hunting. Common feeder choices include crickets, dubia roaches, mealworms, and waxworms, but waxworms should stay occasional because they are richer. Insects should be gut-loaded before feeding and dusted with a reptile calcium supplement. UVB lighting and proper temperatures also support calcium use, so diet and husbandry need to work together.

Soft fruit or unsweetened single-ingredient fruit puree can be used as a treat in small amounts, but it should not replace a complete diet. If your gecko strongly prefers fruit or insects and starts ignoring its staple food, that is a sign to review the feeding plan with your vet.

For most adult crested geckos, a reasonable starting point is about 1 to 2 teaspoons of prepared complete diet per feeding. Some pet parents use a shallow feeding cup and fill it only partway rather than measuring exactly every time. The goal is to offer enough that your gecko can eat comfortably overnight without leaving a large amount behind day after day.

If you are offering insects, keep portions modest. A typical adult serving is about 5 to 10 small crickets or 3 to 4 worms in one session. Prey should be no larger than the space between the gecko’s eyes or the widest part of the head. Remove uneaten live insects after the feeding period, because loose insects can stress or injure reptiles.

Treat fruit should stay small, such as a lick-sized amount or a teaspoon mixed into the staple diet once in a while. Too much fruit can dilute the nutrition of the main diet and may contribute to soft stools or selective eating. If your gecko is gaining too much weight, leaving lots of food behind, or becoming less interested in the staple mix, scale back treats first.

Body condition is the best guide. A healthy adult should look filled out but not bulky, with a smooth tail base and good muscle tone. If you are unsure whether your gecko is underfed, overweight, breeding, or dealing with a health issue, bring a weight log and photos to your vet so the plan can be adjusted safely.

Watch for weight loss, visible hip bones, a thinning tail base, weak grip, poor climbing, repeated missed strikes at insects, or a sudden drop in appetite. These can point to diet imbalance, dehydration, husbandry problems, parasites, mouth pain, or other illness. In reptiles, subtle changes often matter.

Stool changes can also help. Persistent diarrhea, very foul stool, undigested food, or no stool despite eating deserve attention. So do repeated regurgitation, retained shed, swelling of the jaw or limbs, tremors, or a soft-looking jawline. Those signs can be seen with nutritional problems, including calcium imbalance and metabolic bone disease.

See your vet promptly if your gecko has not eaten for an extended period, is losing weight, seems weak, or has trouble moving. An adult may occasionally eat less during stress or seasonal changes, but a prolonged appetite change should not be brushed off. A reptile-savvy exam, weight check, and fecal testing can help sort out whether the issue is diet, environment, or disease.

If your gecko may have eaten a wild-caught insect, moldy food, spoiled fruit, or something toxic, contact your vet right away. Wild insects can carry parasites or toxins, and some insects, including fireflies, are dangerous to reptiles.

If you want variety without throwing off nutrition, the safest alternative is to rotate among reputable complete crested gecko diets rather than replacing the staple with homemade fruit mixes. This keeps the diet balanced while still giving your gecko different flavors and textures.

For live prey, choose commercially raised, gut-loaded feeder insects such as crickets or dubia roaches. These are safer than wild-caught bugs, which may carry pesticides, parasites, or toxins. Dust feeder insects with calcium as directed by your vet, and ask whether your setup and UVB lighting support the supplement plan you are using.

For treats, think small and occasional. Better options include tiny amounts of mashed peach, apricot, banana, pear, or unsweetened single-ingredient fruit puree mixed into the regular diet rather than served alone. Avoid sugary processed foods, dairy, seasoned foods, and anything sticky that can foul the enclosure or attract insects.

If your gecko is picky, do not keep adding richer treats to chase appetite. Instead, review temperatures, humidity, lighting, feeding time, and food preparation, then check in with your vet. A selective eater may need a husbandry adjustment, a different complete diet texture, or a medical workup rather than more treats.