Discoid Roaches vs. Other Feeders: An Honest Comparison
I've fed reptiles on just about everything — crickets, mealworms, supers, dubia, discoids — and the honest answer is that no single feeder wins on every axis. Discoid roaches are my default staple for good reasons, but they have real downsides, and the "perfect Ca:P ratio" claims you'll see online are wrong. Here's the straight comparison I wish I'd had starting out.
The feeders, at a glance
The common live feeders fall into a few camps. Crickets are cheap and everywhere, but loud, smelly, and short-lived. Mealworms and superworms store easily and last forever in the larval stage, but their hard exoskeletons are tougher to digest and supers run fatty. Dubia and discoid roaches are the low-odor, escape-resistant, nutrient-dense options that more keepers move toward over time. Black soldier fly larvae (Phoenix worms / BSFL) are the calcium specialists.
| Feeder | Protein* | Fat* | Climbs glass? | Lifespan | Odor |
|---|---|---|---|---|---|
| Discoid roach | ~20–23% | ~6–8% | No | 1–2 yrs | Low |
| Dubia roach | ~20–23% | ~5–7% | No | 1–2 yrs | Low |
| Cricket | ~18–22% | ~5–6% | Yes (and jumps) | 2–8 wks | High |
| Mealworm | <20% | ~12–15% | No | weeks (larval) | Low |
| Superworm | ~17–20% | ~15%+ | No | weeks (larval) | Low |
*Approximate, on a fresh/as-fed basis; values vary widely with gut-load and source.
Nutritional value: the real picture
On the big numbers, discoids hold up well. They sit around 20–23% protein as fed — right alongside dubia and at or above crickets, and ahead of mealworms. Fat is moderate at roughly 6–8%, lower than the fatty worms, which makes discoids a sensible everyday staple rather than a treat. Moisture sits around 65–70%, comparable to dubia and crickets and far wetter than the dry larvae.
The calcium myth, corrected
Here's where the old articles get it dangerously wrong. You'll see claims that discoids have a "favorable 1:2 calcium-to-phosphorus ratio." They don't. Like nearly every feeder insect, discoids are phosphorus-heavy — closer to 1:3 Ca:P — and that imbalance is exactly what causes metabolic bone disease (MBD) in reptiles if left uncorrected.
The fix is simple and non-negotiable: dust feeders with a calcium supplement before feeding, and gut-load them well beforehand. The one real exception among common feeders is black soldier fly larvae, which are genuinely calcium-rich (roughly 5:1 Ca:P) and the only feeder that doesn't need dusting for calcium. If you remember one thing from this guide, make it that.
Breeding and reproduction
Discoids are forgiving breeders. Females are live-bearers — they carry the egg case internally and deliver live nymphs, roughly 20–40 per brood — which protects the developing young and means you don't manage exposed egg cases. Give them warmth (around 85–95°F to push breeding), moderate humidity (~50–60%), stacked egg flats, and steady food, and a colony becomes self-sustaining with little effort. Nymphs mature in about four to six months.
Compared to crickets, which breed fast but crash fast and die in waves, a roach colony is slower but far more stable. Dubia breed at a similar pace; some keepers find discoids slightly quicker to ramp under identical conditions. The trade-off versus crickets is patience: if you need explosive numbers immediately, roaches won't deliver overnight, but they will give you a reliable rolling supply.
Handling and maintenance
This is where roaches shine. Because discoids don't climb smooth walls and don't fly, feeding and cleaning are low-stress — open the bin, scoop, done. No lid gymnastics, no escapees skittering under the fridge. They tolerate a wide room-temperature band (75–95°F), emit little odor, and need cleaning only every week or two.
Crickets are the opposite experience: persistent smell, constant chirping, and a tendency to die off in big batches when conditions drift even slightly. The maintenance gap is the main reason long-term keepers migrate to roaches.
One genuine limitation: discoids cannot be refrigerated. Mealworms and supers can be cold-stored to pause their development, which is convenient. Discoids are tropical and will die in the fridge — their longevity advantage is staying alive for months at room temperature, not in cold storage.
Longevity and shelf life
Adult discoids live roughly six months to two years depending on temperature and diet. That resilience means you can buy in bulk without watching half your order die in a week — the classic cricket problem, where survival is measured in weeks and overcrowding triggers mass die-offs.
Mealworms last a long time as larvae but eventually pupate into beetles if you don't use them, so they need monitoring. Discoids don't undergo a disruptive life-stage change that makes them unusable, so maintaining a steady feeder population is genuinely easier.
Cost and availability
Discoids sit at a moderate price point — usually more than crickets or mealworms per insect, less than premium feeders like hornworms or silkworms. The bigger factor is availability: discoids are less universally stocked than crickets, so online specialty breeders are the most reliable source. You can order quality stock from All Angles Creatures' discoid roach collection.
The cost math favors roaches over time. A self-sustaining colony amortizes the upfront price to near zero, while crickets are a recurring purchase that partly dies before it's eaten.
Where discoids fit best
Discoids suit a lot of insectivores well:
- Leopard geckos, bearded dragons: protein-dense, not overly fatty — good daily staple, dusted.
- Crested geckos, blue-tongue skinks: the grounded, non-climbing behavior suits substrate-foraging species.
- Frogs, tarantulas: softer-bodied nymphs are easier to digest than hard-shelled larvae.
- Mixed collections: one colony feeds many mouths and simplifies inventory.
The honest downsides
To be fair to the alternatives, discoids aren't perfect:
- Higher upfront cost than crickets or mealworms — a barrier for big collections starting from scratch.
- Need warmth to breed well — tricky in cold homes without supplemental heat.
- Slow movement can fail to trigger motion-driven hunters; you may need to wiggle them with tongs or use a dish.
- Adult size can be too big for small reptiles — you'll separate out nymphs, which is extra work.
- Allergens — like all roaches, their frass and shed exoskeletons can trigger sensitivities in some people handling large colonies.
Discoid vs. dubia: the closest call
These two are the most similar pair. Both are nutrient-dense, low-odor, quiet, non-climbing, and easy to breed. The differences are at the margins:
- Legality: dubia are restricted in some places (notably Florida) over invasive concerns; discoids are often permitted where dubia aren't. This is frequently the deciding factor.
- Hardiness: discoids tolerate a slightly wider, cooler range and shrug off humidity and diet swings a bit better.
- Size range/sourcing: dubia offer a broader, more granular size range and are easier to find.
- Shape: discoids run a touch flatter and wider.
If dubia are legal where you live and you want maximum size flexibility, they're a fine pick. If you want a hardy, widely-legal roach, discoids win. Check your local regulations — Florida's ban on dubia is a well-documented example, and UF/IFAS extension is a good non-commercial resource for the underlying invasive-species reasoning.
Bottom line
Discoids are my default for a mixed insectivore collection: nutritious, hardy, quiet, odor-light, escape-resistant, and self-sustaining. Just don't believe the calcium myth — dust everything and confirm your supplementation with a reliable veterinary source like the Merck Veterinary Manual on reptile nutrition. The "best" feeder is ultimately the one that fits your animal and your tolerance for upkeep, and for a lot of keepers, that's a roach colony.
Dig deeper with the full discoid roach biology guide and, for skink keepers weighing calcium, discoid roaches vs. Phoenix worms for blue-tongue skinks.