Dubia Roaches for Leopard Geckos: Sizes and Amounts

Dubia roaches for leopard gecko feeding make a good staple. A gecko can eat them, and they are high in protein. They are also quiet and rarely climb out of a bin.

The one rule is size, because each roach should be no wider than the space between the gecko’s eyes. Offer them gut loaded and dusted, and rotate them with at least one other feeder.

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Can a Leopard Gecko Eat Dubia Roaches?

Yes. The University of Liverpool veterinary sheet for the leopard gecko (Eublepharis macularius) lists cockroaches as suitable prey.

It names crickets, locusts and mealworms alongside them. The Merck Veterinary Manual also names cockroaches as a common feeder for insectivorous reptiles in general.

The leopard gecko is strictly insectivorous and hunts at night. In the wild it takes scorpions, centipedes, spiders and beetles.

These are hard bodied prey, so a meaty roach suits it. Dubia are one feeder in a rotation, and the full menu is covered in the leopard gecko diet guide.

What Size Dubia Roaches for Leopard Gecko Meals

The standard keeper rule is that a feeder should be no wider than the space between the gecko’s eyes. This is common keeper practice, not a published veterinary measurement.

It works because a gecko swallows prey whole. An oversized roach can be refused or hard to pass.

Animal Diversity Web puts hatchlings at about 85 mm (3.3 in) and adults at about 220 mm (8.7 in). Dubia length changes a lot as nymphs molt. Use the table as a starting point and check each roach against the eye rule.

The ages and nymph lengths in the table are common keeper practice. The only measured sizes come from a feeder study.

It reported nymphs of about 16 mm (0.6 in) and adults of 25.4 to 31.8 mm (1 to 1.25 in). Adult male dubia have wings, and adult females are short winged and heavier, so females make a larger meal.

How Many Dubia Roaches to Feed a Leopard Gecko

No veterinary source gives a fixed roach count or schedule for the leopard gecko. The Liverpool sheet says to gut load prey, dust with calcium and give a weekly multivitamin.

It does not list a number per meal. The figures below are common keeper practice, so adjust them to body condition rather than counting rigidly.

Let the gecko eat for about 10 to 15 minutes, then remove uneaten roaches. A leftover roach can bite a sleeping gecko or stress it, and removal also keeps the tank clean. If the tail looks thick and the belly sags, cut each meal by one or two roaches.

A thin tail, visible hip bones or repeated food refusal call for a reptile veterinarian. A bigger meal is not the fix. A shallow water bowl should be available at all times, as the Liverpool sheet recommends.

Dubia Roach Nutrition

The best measured data for Blaptica dubia come from a feeder study. The American Board of Veterinary Practitioners summarized it.

It tested fasted nymphs and adults, then tested diets high or low in calcium. Protein and fat below are on a dry matter basis as reported, and moisture is the natural water content.

Two points matter for a gecko. First, a natural Ca:P below 1 makes a roach a poor calcium source.

Dusting is needed. Second, the data are for dubia, not for the gecko itself, so they describe the feeder only.

Other studies vary widely. One dubia paper reported 47.5 to 54.3% protein and 35.5 to 44.2% fat on a dry weight basis.

That is far more fat than the study above. A third paper pooled dubia with two other feeder roaches and found 60 to 68% protein and 15 to 21% fat in adults, with Ca:P ratios from 1:1.9 to 1:23.5. Diet, age and method change the numbers, so treat any single figure as approximate.

Insects in general are low in calcium. A Wageningen review adds that cultured insects carry little vitamin D and almost no preformed vitamin A. Rotating feeders helps cover gaps, and the feeder insect guide compares the options.

No authoritative page gave dubia vitamin A values. Ask a reptile veterinarian about vitamin A if the gecko has poor sheds or swollen eyelids.

Gut Loading and Dusting Dubia

Merck advises feeding insects a nutritionally complete, high calcium diet first. It also advises dusting with a high calcium supplement immediately before feeding. The dubia study supports the first step.

A high calcium diet raised nymph calcium from 0.13% to 1.2%. A low calcium diet did not fix the inverted ratio.

Adult roaches in that study kept a positive Ca:P for 72 hours after gut loading. A short fast did not erase the effect.

Feed the colony a high calcium diet for at least 24 hours before use, and longer is fine. The method is explained in the gut loading guide.

Dust the roaches just before the meal by shaking them in a cup with a pinch of calcium powder. Choose the supplement with the calcium supplement guide.

A smooth sided dish keeps dusted roaches in one place so the gecko can hunt them. An escape proof feeder dish works for that.

Are Dubia Roaches Legal?

Not everywhere. Rules on live roaches come from agriculture agencies and differ by state, province and country. Florida is the clearest case: the Florida Department of Agriculture lists Blaptica dubia by name as a prohibited organism in its exotic arthropod import guidelines.

The same Florida document puts mealworms, superworms and house crickets in its regular permit category, so those feeders are the Florida backup. Other places may restrict nonnative roaches too, and sellers often refuse to ship there.

Check your state agriculture department before buying or breeding a colony. Keep every roach contained either way.

Keeping a Small Dubia Colony

A small colony saves money and gives a steady supply of every size. The feeder study kept roaches at about 22 to 23°C (72 to 73°F) and 50% humidity. Mortality was low.

Keepers who breed for faster growth commonly run the bin warmer, around 80 to 90°F. That is common keeper practice, not a sourced figure.

• Use a lidded plastic bin with a mesh covered vent and a smooth upper wall.
• Add cardboard egg flats for hiding space, and feed a high calcium diet plus fresh vegetables for moisture.
• Keep about 1 male to 3 or 4 females for breeding, a common keeper ratio.
• Remove dead roaches and old food weekly to prevent mold and mites.

If breeding sounds like too much work, live feeder insects in several sizes can be bought as needed. Per the study, the nymph stage lasts 180 to 380 days and a full life can reach 530 days. A colony starts slowly.

Dubia Roaches vs Crickets

The two feeders have a similar calcium ratio, so neither replaces dusting. Dubia win on noise, smell and escapes.

Crickets win on price. Many keepers use both, which also spreads nutrient gaps.

Risks and Common Problems

• Oversized roaches: a roach wider than the space between the eyes can be refused or cause trouble passing. Drop to the next size down.
• Wild caught roaches: never feed them, because they may carry pesticides or parasites. Use cultured colonies only.
• Feeding only dubia: no single feeder covers calcium, vitamin D and vitamin A. Rotate feeders and follow the care guide.
• Refusal: the Liverpool sheet says food refusal, weight loss or abnormal stool needs a veterinary visit.

Fat content is the other watch item. Adult dubia in the study held about 16% fat, but unlimited meals still add weight.

Check the tail every few weeks. For other geckos, see gecko diet.

More species care pages sit in the leopard gecko hub.

Frequently Asked Questions

Do dubia roaches for leopard gecko meals bite?

Dubia are not known as biters and no veterinary source reports bites from them. As common keeper practice, remove leftovers after 10 to 15 minutes so a roach cannot bother a sleeping gecko.

Can baby leopard geckos eat dubia roaches?

Yes, if the nymphs are tiny and no wider than the space between the eyes. Hatchlings are about 85 mm long, so start with pinhead to 0.4 inch nymphs and dust each meal.

Do dubia roaches need to be alive?

Live roaches trigger the hunting response of a nocturnal ambush hunter. No veterinary source rates freeze dried insects for this species. Ask a reptile veterinarian if a gecko will not hunt.

Can dubia roaches be the only food?

No. Their calcium is low in natural form and cultured insects hold almost no vitamin D or preformed vitamin A. Rotate feeders, dust with calcium and give the weekly multivitamin that the Liverpool sheet recommends.

Will dubia roaches infest a house?

Dubia need warmth and humidity to breed, so a cool house is a poor host, but the risk is why Florida prohibits them. A lidded, smooth walled bin and a quick count at feeding time prevent most escapes.

Are adult dubia too big for a leopard gecko?

Adult dubia of 25 to 32 mm suit a full grown gecko, but check the eye rule first. Females are bulkier than males of the same length, so offer them only to adults.