Crested Gecko Feeding Schedule and Portion Size Chart

Crested geckos are omnivores, but in captivity their healthiest routine usually centers on a commercially prepared complete crested gecko diet mixed fresh with water. Current reptile care references from PetMD note that these diets are designed to be the main food, while insects are usually offered once or twice weekly rather than as the entire diet. That matters because feeding too many insects, too much fruit, or oversized prey can throw off calcium balance and overall nutrition.

A helpful way to think about feeding is by life stage. Young, growing geckos usually need food offered more often than adults. Many pet parents do well with this starting chart: hatchlings and small juveniles: offer complete diet daily, older juveniles: 4-5 nights weekly, and adults: every other night or about 3 nights weekly. Your vet may adjust that schedule if your gecko is underweight, overweight, breeding, recovering from illness, or not eating well.

Because crested geckos are nocturnal, food is best offered at night. Mixed diet should be removed and replaced regularly so it stays fresh. PetMD notes that mixed complete diet can generally stay in the enclosure for up to 24 hours before removal. Fresh water should be available every day.

Environment also affects appetite. Merck Veterinary Manual emphasizes that temperature, humidity, photoperiod, stress, and enclosure setup can all change feeding behavior. So if your gecko suddenly eats less, the issue may not be the menu alone. Before changing the diet dramatically, it is smart to review husbandry and check in with your vet.

There is no single scoop size that fits every crested gecko, so portion size is best based on age, body condition, and how much is left over by morning. For complete powdered diet, many pet parents start with a small shallow dish containing about 1-2 teaspoons of prepared food for juveniles and 1-3 teaspoons for adults, then adjust up or down based on intake. The goal is not a full bowl. It is a modest serving that is fresh, easy to access, and mostly eaten or clearly sampled overnight.

For insects, portion size should stay conservative. PetMD lists a typical adult serving as about 5-10 crickets or 3-4 worms per feeding session. Prey should be no larger than the widest part of the gecko’s head. If your gecko is young, use smaller prey and fewer pieces. Only offer what your gecko can finish in one sitting, because uneaten live insects can stress or injure reptiles.

A simple portion chart many families can use is: small juvenile: 1 teaspoon prepared diet nightly, medium juvenile: 1-2 teaspoons prepared diet 4-5 nights weekly, adult: 1-3 teaspoons prepared diet 3 nights weekly or every other night. If offering insects, start with a small test portion once weekly, then adjust with your vet based on weight trend, stool quality, and appetite. Fruit or unsweetened single-ingredient fruit puree should stay an occasional treat, not a staple.

If your gecko is gaining too much weight, leaving large amounts of food untouched, or refusing the complete diet in favor of insects, the portions may be too generous or the menu may be too treat-heavy. Your vet can help you tailor a safer plan, especially for breeding females and growing juveniles that may need closer calcium and calorie monitoring.

Watch for weight loss, a visible spine or hip bones, weak jaw strength, tremors, trouble climbing, poor shedding, constipation, diarrhea, or a sudden drop in appetite. These can point to feeding problems, husbandry issues, dehydration, parasites, or metabolic bone disease. A gecko that only wants insects and consistently refuses a complete diet may also be developing an unbalanced routine.

Stool changes matter too. Loose stool after fruit treats, very infrequent stool, or undigested insects can mean the feeding plan needs adjustment. Leftover food every morning is not always an emergency, but if your gecko repeatedly ignores meals, loses condition, or seems less active than usual, it is time to reassess.

See your vet immediately if your crested gecko is not eating and is becoming weak, cannot climb normally, has a swollen jaw or limbs, seems dehydrated, or may have eaten something unsafe. ASPCA warns that fireflies should never be fed to reptiles because they are toxic and can be fatal. If there is any chance your gecko ate a wild-caught insect, a toxic plant, or another questionable item, contact your vet right away.

Even subtle feeding issues can build slowly in reptiles. If you are unsure whether your gecko is too thin, too heavy, or getting enough calcium, a weight check and husbandry review with your vet is often the safest next step.

If your current routine feels inconsistent, the safest alternative is to make a complete powdered crested gecko diet the foundation of feeding. This is usually easier to portion, more balanced than fruit-heavy homemade mixes, and less likely to create calcium problems than an insect-only plan. Many pet parents find that using the same small dish, feeding at the same evening time, and removing leftovers the next day makes intake easier to track.

For enrichment, you can rotate in gut-loaded feeder insects such as crickets, dubia roaches, or mealworms in small amounts. Merck Veterinary Manual emphasizes the importance of calcium balance in reptile diets, and both Merck and PetMD support gut-loading feeder insects before use. Dusting schedules vary by setup, UVB exposure, and life stage, so it is best to confirm the supplement plan with your vet.

If you want to offer treats, choose small amounts of soft fruit or unsweetened single-ingredient fruit puree only occasionally. Avoid sugary mixes, heavily processed baby foods with additives, oversized prey, and wild-caught insects. Wild insects can carry pesticides or parasites, and ASPCA specifically warns that fireflies are dangerous for reptiles.

If your gecko is picky, do not force-feed or keep adding more treats to tempt eating. Instead, review temperature, humidity, lighting, and stress, then talk with your vet about a stepwise feeding plan. In many cases, a calmer enclosure and a more measured schedule work better than offering more food.