Are Discoid Roaches the Best Feeder for Leopard Geckos? A Complete Guide
- Role
- Staple feeder
- Protein
- ~20%
- Fat
- ~6.5%
- Moisture
- ~60%
- Chitin
- low
- Ca:P
- 1:3
- Calcium-rich
- No (dust it)
- Best for
- Most insectivores — beardies, geckos, frogs, monitors
I get asked constantly whether discoid roaches are "the best" feeder for leopard geckos. My honest answer: they're one of the two or three best staple feeders you can pick, and for a lot of keepers they're the single most practical choice. But "best" depends on what you're optimizing for, and there are real drawbacks nobody mentions in the breathless blog posts. Here's the complete, no-hype picture.
What leopard geckos need from a staple feeder
Leopard geckos (Eublepharis macularius) are insectivores, so their feeders are their entire diet. A staple feeder has to do three jobs well: supply solid protein with moderate (not excessive) fat, be safe and easy to digest, and — once supplemented — keep calcium in balance to prevent metabolic bone disease. On top of that, the ideal staple is practical for you: easy to keep alive, low-odor, hard to escape, and available in the right sizes. Discoids check nearly every box. The Merck Veterinary Manual on reptile nutrition is a solid non-commercial reference on why protein, fat, and calcium balance all matter.
What discoid roaches are
Discoid roaches (Blaberus discoidalis) are a tropical roach native to Central and South America. Adults reach about two inches, with a flattened, glossy, oval body. They're sometimes called "false death's head" roaches. A few biological facts make them ideal feeders: they can't climb smooth vertical surfaces, they don't fly, and they're live-bearers — females carry the egg case internally and give birth to live nymphs, so there's no fragile egg case to manage. They also happen to be legal in places like Florida where dubia roaches are restricted, which is a big reason southern-US keepers favor them.
Nutritional profile
Discoids are a high-protein, moderate-fat, high-moisture feeder:
- Protein: roughly 20% — strong support for muscle and growth.
- Fat: moderate (around 6–9%), enough for energy without the obesity risk fattier feeders bring.
- Moisture: roughly 60–70%, which helps keep a gecko hydrated.
- Chitin: low — softer-bodied and easier to digest than crickets or mealworms.
Now the correction that this entire topic gets wrong: discoids do not have a naturally favorable calcium-to-phosphorus ratio. Like virtually every feeder insect, they're phosphorus-heavy. You fix that by dusting with calcium before feeding — every feeding for growing geckos, on a regular schedule for adults, with calcium-plus-D3 or a multivitamin rotated in. Gut-loading makes the roach more nutritious overall, but it does not rebalance calcium. Anyone who tells you discoids are calcium-rich enough to skip dusting is giving you advice that ends in metabolic bone disease.
How discoids compare to other feeders
| Feeder | Protein | Fat | Role | Notes |
|---|---|---|---|---|
| Discoid roach | High (~20%) | Moderate | Staple | Soft, low chitin, can't climb, legal where dubia aren't |
| Dubia roach | High (~20–23%) | Moderate | Staple | Nearly identical; faster breeder; restricted in FL |
| Cricket | Moderate (~18%) | Low–moderate | Staple/variety | Noisy, smelly, short-lived, escape-prone |
| Mealworm | Moderate | Moderate | Occasional | Harder chitin; not ideal as sole staple |
| Superworm | Moderate | High (~15%) | Treat | Fatty; hard head capsule |
| Hornworm | Low (~9%) | Low | Treat | Mostly water; great for hydration |
| Butterworm | Moderate | Higher | Treat | Irresistible but fattening; can't breed |
The takeaway: discoids and dubia are effectively interchangeable, and both beat crickets on nutrition and practicality. The fattier worms (superworm, butterworm) and the watery hornworm are treats, not staples. A discoid-based diet with treats rotated in is a genuinely excellent leopard gecko menu.
The benefits, honestly
- Easy to digest. Low chitin and a soft body mean less impaction risk than hard-shelled feeders.
- High, lean nutrition. Good protein, moderate fat — the right macro profile for a leo.
- Low parasite risk compared with wild-caught insects, since you're feeding captive-bred stock.
- Long-lived and odorless. Discoids live for months and a healthy colony barely smells — a world apart from a cricket bin.
- They trigger the hunt. Their slow, deliberate movement reliably sparks a leopard gecko's stalk-and-strike response.
The drawbacks nobody mentions
Being honest about the downsides is what separates a real care guide from an ad:
- Cost and availability. Discoids can cost more than crickets and aren't on every pet-store shelf, so you'll often order them online.
- Slow to breed. If you want to raise your own, discoids ramp slowly — plan 4–6 months and consistent heat before a colony produces. They demand the mid-80s to 90°F to breed at all.
- Nymph escape (in a colony). Adults can't climb smooth walls, but pinhead nymphs can slip through coarse ventilation, so a breeding bin needs fine-mesh screening.
- They can fixate. A gecko fed only one feeder can become a picky eater, so rotate variety in even with a great staple.
- Overfeeding is easy. Because geckos eat them readily, it's easy to overfeed and end up with an overweight gecko. Watch the tail base.
Sourcing and storing
Buy from a supplier that keeps clean, healthy colonies — look for active, glossy roaches in a range of sizes, free of mites. When I restock, I order nymphs sized to my geckos from All Angles Creatures' discoid roach collection. To hold feeders short-term (not breeding), keep them in a smooth-sided, ventilated tub at room temperature or slightly warmer, with egg flats for hiding, a bit of dry chow, and a piece of carrot or potato for moisture. Don't refrigerate them — they're tropical and cold is hard on them.
How to feed discoids to your leopard gecko
- Gut-load first. For 24–48 hours before feeding, give the roaches leafy greens, carrot, squash, and a quality dry feeder chow. Their nutrition becomes your gecko's nutrition.
- Dust with calcium. Toss the roaches in a calcium supplement right before offering them, with calcium-plus-D3 or a multivitamin on the schedule your supplement brand and lighting setup call for.
- Size them right. Each roach should be no longer than the space between the gecko's eyes. Too large risks impaction or choking.
- Feed on an age-appropriate schedule. Juveniles daily (as many as they take in a 10–15 minute window); adults every 2–3 days, a few roaches per session.
- Keep it clean. Use a smooth feeding dish so roaches can't scatter, and remove anything uneaten so a loose roach isn't hiding in the enclosure overnight.
So — are they the best?
For most leopard gecko keepers, discoid roaches are either the best staple or tied for it with dubia. They're nutritious, lean, easy to digest, low-hassle to keep, and they trigger a strong feeding response. The "best feeder" honestly isn't a single insect, though — it's a discoid (or dubia) staple plus rotated variety, all gut-loaded and calcium-dusted. Build the diet on discoids, add a hornworm for hydration and the occasional treat, dust everything, and you've got a leopard gecko diet that's hard to beat.
Curious how discoids stack up against specific alternatives? See discoid roaches vs. butterworms, or browse the full feeder insect care library. To raise your own, my discoid roach breeding playbook has the complete colony setup.