This is the step-by-step SOP for gut-loading crickets, dubia roaches, and other feeders before offering them to your dragon. For which insects to buy, see our feeder insect roundup; for daily greens, see best staple greens.
What gut-loading is (and isn’t)
Gut-loading is feeding the feeder insects a calcium-rich, vitamin-balanced diet for 24–48 hours before offering them to your dragon. Whatever the insect eats ends up inside its gut; your dragon digests both the insect and the gut contents. Done badly, “gut-loading with carrot” is just a slogan. Done well, it raises the calcium content of a cricket or roach several-fold and is the most cost-effective calcium boost in reptile husbandry [$TRAE_REF](https://zoomed.com/bug-balance-gut-load/).
Two things gut-loading is not:
- It’s not dusting. Dusting is shaking insects in calcium powder right before feeding. Gut-loading happens 24–48 hours before, in a separate enclosure. The two complement each other; they don’t replace each other.
- It’s not “feeding the insects whatever’s in the kitchen.” Spinach, citrus, avocado, and lettuce are all the wrong choice — see the avoid list below.
How long to gut-load
Most feeder insects clear their gut within 24–48 hours, so a 24-hour minimum load is the floor. ARAV-aligned clinical references call for 48 hours when practical, especially for dubia roaches and crickets [$TRAE_REF](https://www.zubairkhalid.com/knowledge/veterinary-medicine/reptile-care/bearded-dragon-diet).
| Insect | Minimum gut-load | Ideal gut-load | Notes |
|---|---|---|---|
| Crickets | 24 hours | 48 hours | Empty their gut fastest. Skip citrus, lettuce, and high-oxalate greens. |
| Dubia roaches | 24 hours | 48–72 hours | Slower metabolism; can sustain longer loads. Avoid citrus and avocado. |
| Hornworms | 24 hours | 48 hours | Already high hydration; focus gut-load on calcium + vitamin A. |
| Mealworms | 24 hours | 48 hours | Harder to gut-load efficiently; consider BSFL as a substitute. |
| Black soldier fly larvae (BSFL / CalciWorms) | Pre-loaded by the producer; no gut-loading needed. | Already ~55:1 Ca:P. Best calcium ratio in the feeder market. | |
| Superworms | 24 hours | 48 hours | Higher fat; rotate, don’t staple. |
[IMAGE: gut-loading timer infographic, source-needed, alt=”Gut-loading timeline showing 48 hour cycle from separate insect enclosure to dragon offering with dusting step”]
Step-by-step: the gut-loading SOP
This is the routine that aligns with the most current exotic veterinary guidance [$TRAE_REF](https://www.zubairkhalid.com/knowledge/veterinary-medicine/reptile-care/bearded-dragon-diet)[$TRAE_REF](https://zoomed.com/cricket-care/).
Step 1 — Separate the insects into a “gut-load” enclosure
Don’t gut-load in the same tub they arrived in. That bedding is usually empty calories (dry bran, cardboard, newspaper) and may even carry parasites from the breeder facility. Use a clean plastic tub with ventilation holes, paper towel substrate, and egg crates for climbing.
Step 2 — Provide a calcium-rich gut-load diet
Pick one approach:
- Commercial gut-load formula — Repashy Bug Burger, Arcadia InsectFuel, Zoo Med Bug Balance. Repashy is the most commonly recommended by veterinarians. Mix with water per package, replace every 24–48 hours.
- DIY gut-load — a finely ground mix of organic wheat bran, alfalfa powder, spirulina, and a calcium carbonate source (e.g., crushed cuttlebone). Aim for ~8% calcium in the dry mix [$TRAE_REF](https://img1.wsimg.com/blobby/go/1a7ee985-01f5-4b9e-bdcd-96f5d78aca5f/downloads/Cricket%20care.pdf).
Either is fine; commercial is more consistent. If you go DIY, store the dry mix in the freezer and replace every 4–6 weeks so the fats don’t go rancid.
Step 3 — Provide hydration, not water
Crickets and small roaches drown in open water within minutes. Use one of these instead:
- Water gel crystals (e.g., Zoo Med Cricket Block, Fluker’s Cricket Quencher). Inert, long-lasting, low contamination risk.
- Fresh vegetables with high water content — orange slice, carrot slice, or a small piece of sweet potato. These also contribute sugars and vitamins but spoil quickly, so replace every 12 hours.
Step 4 — Time it (24 to 48 hours)
Start the gut-load at the same time of day you plan to feed your dragon in 1–2 days. Maintain continuous access to food and water source during this window.
Step 5 — Dust, then offer
Immediately before offering the insects to your dragon, place them in a small container with a light coating of calcium powder (no D3) and shake gently. This is the dusting step that adds the final calcium boost on top of the gut-load. See our calcium supplement guide for product selection.
Step 6 — Clean up
Remove uneaten insects from the dragon’s enclosure within 15–20 minutes of feeding. Crickets in particular will hide, then chew on a sleeping dragon overnight. Dubia roaches are less of an issue but should still be offered in a bowl or feeding dish.
What to feed (and not feed) the insects
Good gut-load foods
- Carrot, sweet potato, butternut squash (carotenoids, moisture)
- Collard, mustard, turnip greens (low-oxalate, high calcium)
- Organic wheat bran, alfalfa meal
- Spirulina, chlorella
- Squash, bell pepper, zucchini (variety)
- Cuttlebone or calcium carbonate (separate dish)
Bad gut-load foods
- Spinach, beet greens, Swiss chard — high oxalates, bind calcium the same way they would in your dragon [$TRAE_REF](https://exopetguides.com/bearded-dragon/bearded-dragon-gut-loading-guide/).
- Citrus (orange, lemon, lime, grapefruit) — high acidity; can cause mouth and gut irritation in the insects and your dragon.
- Avocado — toxic (persin).
- Onion, garlic, leek — toxic.
- Iceberg lettuce — almost no nutrition; just water.
- Dog food, cat food, fish flakes — wrong calcium-to-phosphorus ratio.
- Wild-caught plants — pesticide risk.
Foods that are “safe but useless”
Potato peels, rice, bread, and other starchy scraps fill insects up without delivering meaningful calcium or vitamins. They’ll be alive but nutritionally similar to a “premium” insect fed only on bran.
Gut-load vs dusting: how to layer them
The two work in sequence, not as substitutes.
| Step | When | What |
|---|---|---|
| Gut-load | 24–48 hours before feeding | High-calcium diet in separate enclosure |
| Dusting | Immediately before feeding | Light calcium powder coat on insects |
| UVB exposure | Continuous | T5 HO at correct distance (separate variable) |
For young dragons (under 12 months), do this at every insect meal. For adults, gut-load every meal but reduce dusting to 3–4 times per week with calcium (no D3), per our calcium schedule [$TRAE_REF](https://reptifiles.com/bearded-dragon-care/bearded-dragon-diet/).
Common mistakes to avoid
1. “Gut-loading” for 10 minutes before feeding
An insect needs 24+ hours to fully metabolize and store calcium. Anything shorter is essentially feeding the insect, not gut-loading it.
2. Leaving the same food in the tub for a week
Wet gut-load spoils within 24–48 hours and grows mold and bacteria. Replace daily.
3. Skipping dusting because “the gut-load was enough”
Gut-load and dusting are layered. Skipping the dusting step leaves a meaningful calcium dose on the table.
4. Using calcium-fortified “cricket food” alone, with no vegetables
The pellet is fine. But variety in the gut-load (vegetables + protein + calcium) raises vitamin A, carotenoids, and hydration — all of which transfer to your dragon.
5. Storing DIY gut-load mix in the fridge for months
The oils go rancid. Store DIY mix in the freezer; replace every 4–6 weeks.
Quick answers
How long should I gut-load crickets before feeding?
24 hours minimum, 48 hours ideal. Crickets clear their gut quickly, so longer than 72 hours doesn’t add much benefit and risks food spoilage.
Do I still need to dust if I gut-load?
Yes. Gut-load raises the insect’s baseline calcium; dusting is the final coat before the dragon eats them. Both work together.
Can I use orange slices for hydration?
Yes, in small amounts and only as a moisture source, not the gut-load itself. Citrus is not recommended as the main gut-load because the acidity can bother some insects and most dragons.
Do black soldier fly larvae need gut-loading?
No. Commercial BSFL (often sold as CalciWorms) are pre-loaded with calcium at the producer and have the best Ca:P ratio (~55:1) of any common feeder.
What about hornworms?
Hornworms are already very high in moisture and relatively low in calcium. They’re fine as an occasional feeder for hydration but shouldn’t be a staple regardless of gut-loading.
Is Repashy Bug Burger the best gut-load?
It’s the most widely recommended by exotic veterinarians and is convenient. Arcadia InsectFuel and Zoo Med Bug Balance are comparable. The “best” gut-load is the one you’ll actually use consistently.
Sources & review
- Zoo Med – Cricket Care: https://zoomed.com/cricket-care/
- Zoo Med – Bug Balance Gut Load: https://zoomed.com/bug-balance-gut-load/
- Zoo Med – Cricket Block (Calcium + Hydration): https://zoomed.com/cricket-block-cricket-calcium-and-gutload-block/
- Cricket Care PDF (ARAV-aligned): https://img1.wsimg.com/blobby/go/1a7ee985-01f5-4b9e-bdcd-96f5d78aca5f/downloads/Cricket%20care.pdf
- ReptiFiles – Bearded Dragon Diet: https://reptifiles.com/bearded-dragon-care/bearded-dragon-diet/
- ARAV-aligned Vet reference (Zubair Khalid): https://www.zubairkhalid.com/knowledge/veterinary-medicine/reptile-care/bearded-dragon-diet
- ExoPetGuides – Bearded Dragon Gut-Loading Guide: https://exopetguides.com/bearded-dragon/bearded-dragon-gut-loading-guide/
Last reviewed: 2026-09-01 · Next scheduled review: 2027-03-01 · Editor: Bearded Dragon Hub Editorial Team
Educational content only. Not a substitute for hands-on veterinary care.