How to Feed Dried Black Soldier Fly Larvae: Amounts, Animals, and Methods

Dried black soldier fly larvae (BSFL) are one of the most useful things you can keep in the feed cupboard — high in protein, naturally high in calcium, shelf-stable, and loved by everything from backyard hens to bearded dragons. But "useful" turns into "great" only if you feed them correctly, and the two questions I get most are always the same: how much, and do I need to do anything to them first? This is the hands-on guide — amounts by animal, how to rehydrate, how to spot quality, and how to store them — so you get the nutrition without the common mistakes.

First, what you're working with

Dried BSFL (Hermetia illucens larvae, oven- or microwave-dried) are a supplement, not a complete diet. They run roughly 35–45% protein and 25–35% fat, with one standout feature: they're the rare feeder insect with a naturally favorable calcium-to-phosphorus ratio. Nearly every other feeder — crickets, roaches, mealworms, superworms — is phosphorus-heavy and has to be dusted with calcium powder. BSFL doesn't, which makes it a genuinely valuable calcium source for reptiles and laying poultry.

Two things follow from the makeup. First, the high fat means it's a treat or top-up, not the whole meal, for most animals. Second, the dry, chewy, chitin-rich texture means some animals appreciate it rehydrated. Both shape how you feed it.

How much to feed, by animal

These are practical, conservative inclusion guidelines. The universal advice: start low, introduce gradually, and watch the animal's response before increasing.

• ◆Backyard chickens (broilers/general): up to about 10–15% of the daily diet. Excellent for feathering, growth, and as a high-value treat. Far better than the dried mealworms most stores sell.
• ◆Laying hens: about 5–10% of the diet. The calcium content directly supports eggshell strength — one of the best uses for BSFL.
• ◆Chicks: introduce gently at 2–5% as their digestion adapts to the protein.
• ◆Ducks and other poultry: similar to chickens — a protein-rich treat scattered in or mixed with feed.
• ◆Reptiles (bearded dragons, turtles, box turtles, larger geckos): a treat a few times a week, sized to the animal. The built-in calcium is a real plus; offer alongside live feeders for moisture and feeding response.
• ◆Fish (tilapia, trout, koi, goldfish, aquarium fish): can make up 10–20% of the feed; carnivorous species tolerate the higher end. A clean alternative to fishmeal-based food.
• ◆Hedgehogs and sugar gliders: a few larvae per feeding as a protein treat — popular and well-accepted.
• ◆Wild garden birds: offered freely as a high-energy, calcium-rich option, especially valued in breeding season.
• ◆Dogs: a small amount as a meal topper for protein and skin/coat support; not a primary protein.

The thread through all of these: it's a supplement. Because of the fat, letting BSFL become the entire diet leads to obesity and unbalanced nutrition. Keep it as part of a varied, balanced diet.

Rehydrating — when and how

Dry larvae are convenient, but the dryness has trade-offs: less moisture for the animal, and a tougher texture that some reptiles and turtles find off-putting. Rehydrating fixes both.

• ◆How: drop the larvae in a small dish of warm (not hot) water for 10–15 minutes until they plump up and soften, then drain and offer.
• ◆Who benefits most: reptiles (especially turtles and tortoises that browse from a dish), animals that need extra hydration, and any picky eater put off by the dry texture.
• ◆Who doesn't need it: chickens, ducks, and fish almost always take them dry without any issue.

Don't rehydrate more than you'll use in a feeding — rehydrated larvae spoil quickly and should be treated like fresh food.

Mixing into feed

For poultry, fish, and livestock, you can simply mix dried larvae into the regular feed. A few tips that make it work:

• ◆Crush or grind the larvae for small animals, chicks, or fish that need smaller particles — it also helps them blend evenly into a feed mix rather than getting picked out.
• ◆Introduce gradually. Animals new to BSFL sometimes hesitate. Start with a small proportion mixed into the familiar feed and increase over a week or two.
• ◆A flavor nudge (a little oil or, for poultry, a touch of their usual treat) can speed acceptance for fussy animals, though most take to BSFL readily.

Sourcing quality larvae

Not all dried BSFL is equal, and quality comes down to how the larvae were raised and dried. What to look for:

• ◆Uniform tan-brown color, dry and intact — not greasy, clumped, dusty, or crumbling.
• ◆No off or rancid smell. A rancid smell means the fats have oxidized; pass on it.
• ◆A transparent supplier that's clear about how the larvae were raised (clean food-waste or agricultural feedstock, not undefined material) and processed. Larvae grown on clean, consistent diets have the best and most reliable nutrition.

For a dependable, well-processed supply, All Angles Creatures carries dried black soldier fly larvae suited to poultry, reptiles, fish, and exotic pets alike.

Storage

Dried larvae are easy to keep, with one enemy: moisture. Store them in an airtight container in a cool, dark, dry place, away from direct sunlight and heat, which degrade the fats and nutrition over time. A desiccant pack extends shelf life. Always glance for any sign of moisture, mold, or clumping before use, and discard anything that smells off. Stored well, they keep for many months.

Preparing them for specific animals

A little tailoring goes a long way:

• ◆Turtles and tortoises: rehydrate first — they browse from a dish and the softened larvae are easier to eat and add moisture. For omnivorous turtles, BSFL is a useful calcium-rich protein alongside greens.
• ◆Bearded dragons and larger geckos: offer rehydrated or dry as a treat a few times a week; the built-in calcium means you can skip dusting for these specific feedings, though your live staples still need it.
• ◆Chicks and small fish: crush or grind the larvae so the particle size suits small mouths and mixes evenly into feed.
• ◆Laying hens: feed dry, scattered or mixed in — the calcium directly supports shell quality, and hens self-regulate well.
• ◆Hedgehogs and sugar gliders: a few whole larvae per feeding as a treat; no prep needed, though some prefer them lightly rehydrated.

Signs you're feeding too much

Because BSFL is rich, it's possible to overdo it. Watch for these and scale back if you see them:

• ◆Weight gain or a fattening body condition in reptiles or small mammals — a sign the fat content is becoming too large a share of the diet.
• ◆Reduced appetite for staple feed — if an animal fills up on BSFL treats and ignores its balanced diet, cut the BSFL back.
• ◆Loose stool or digestive upset, especially soon after a sudden increase — slow the introduction and reduce the portion.
• ◆Picky refusal of variety — animals can get hooked on a rich treat and snub healthier staples, so keep BSFL as one part of a varied diet, not the headline.

The fix in every case is the same: treat BSFL as a supplement, keep portions modest, and let a balanced diet carry the bulk of the nutrition.

Common mistakes to avoid

• ◆Feeding them as a complete diet. They're a supplement — the fat and chitin make them too rich to be the whole meal.
• ◆Never rehydrating for animals that need it. Turtles and some reptiles do much better with plumped, softened larvae.
• ◆Buying the cheapest option blindly. Bargain larvae are often poorly dried or raised on undefined waste, with rancid fats or weak nutrition.
• ◆Storing them loosely. An open bag invites moisture and mold. Seal it.
• ◆Dosing too fast. Sudden large amounts can cause digestive upset and refusal. Ramp up gradually.

Introducing it to a hesitant animal

Some animals take to BSFL instantly; others, used to a familiar diet, hesitate at first. If yours is reluctant:

• ◆Mix, don't replace. Start with a small amount of BSFL blended into the food they already eat, then increase the proportion over a week or two as they accept it.
• ◆Rehydrate for softness. A plumped, softened larva is more appealing than a dry, chewy one — often that alone wins over a picky reptile or turtle.
• ◆Pair with movement for reptiles. If a reptile ignores motionless food, offer BSFL right after a live feeder while the animal is in feeding mode, or hand-feed with soft tongs.
• ◆Be patient. Hesitation is almost always temporary. Forcing large amounts on a reluctant animal backfires; a gradual ramp wins nearly every time.

The short version

Use dried black soldier fly larvae as a protein-and-calcium supplement, not a sole diet: roughly 10–15% of the diet for chickens, 5–10% for layers, a few-times-a-week treat for reptiles, 10–20% for fish, and a small treat for hedgehogs, gliders, and dogs. Rehydrate in warm water for reptiles and picky eaters; feed dry to poultry and fish. Buy clean, intact, well-dried larvae from a transparent source, store them sealed and dry, and introduce gradually. Done this way, BSFL delivers excellent nutrition — including the calcium most feeders can't — with almost no hassle.

Want the background? See what dried black soldier fly larvae are and why they work and the case for BSFL over fishmeal and soy. The feeder insect care library covers every other feeder. On reptile calcium and bone health, the Merck Veterinary Manual is a reliable reference.