Buffalo Beetles: A Keeper's Guide to the Bioactive Cleanup Crew (and Feeder)

I'll say upfront what most articles about "buffalo beetles" won't: the name is a mess, and the confusion around it leads people to do the wrong thing. Half the pages online describe buffalo beetles as a household pest to exterminate; the other half describe a magic farm insect that cleans skeletons. Both are talking about a different beetle. In the reptile and bioactive hobby — which is where I keep them — "buffalo beetle" means one specific, useful, slightly underrated little animal: Alphitobius diaperinus, the lesser mealworm.

This is the complete guide to that animal: what it actually is, how to tell it apart from the beetles it gets confused with, how to culture it, how to use it as a bioactive cleanup crew, how to feed it off as a small feeder, and — most importantly with this species — how to keep it from taking over. Read it once and you'll never be confused by a buffalo-beetle article again.

What buffalo beetles actually are

Buffalo beetles are Alphitobius diaperinus, commonly called the lesser mealworm. They belong to the family Tenebrionidae — the darkling beetles — which is the same family as the regular yellow mealworm (Tenebrio molitor) and the superworm (Zophobas morio). That single fact tells you most of what you need to know about how to keep them, because if you've ever cultured mealworms, buffalo beetles work almost identically, just smaller and faster.

The adults are small, glossy, dark brown to nearly black, oval beetles, roughly 0.2–0.3 inches (5–7 mm) long. The larvae — the stage sold and used as a feeder — are slender, segmented, tan-to-brown grubs that look exactly like a miniature mealworm, which is what they are. In the hobby the larvae are sold as "buffalo worms." Same animal, different life stage.

Like all darkling beetles, they go through complete metamorphosis: egg → larva (the "buffalo worm") → pupa → adult beetle. A culture in good conditions runs all four stages continuously and overlapping, which is part of why they're so productive — and so prone to overpopulating.

In the wild and in agriculture, Alphitobius diaperinus is best known as a resident of poultry houses, where it lives in litter and manure, scavenging spilled feed, dead birds, and organic waste. Entomologists at the University of Florida's Featured Creatures program document the lesser mealworm primarily as a poultry-house insect and a known nuisance there — which is exactly why responsible keeping matters, and why I spend a whole section below on not letting them escape or explode. Their natural ecology — warm, dry-ish, organic-rich, scavenging detritus — is your care sheet. Everything below is just a way of recreating a clean version of that inside a bin.

Fixing the name confusion (this matters)

Three different beetles get called "buffalo beetle" or get mixed up with it, and if you grab care advice meant for the wrong one you'll either fail to keep them or panic about a pest that isn't there. Here's the untangling:

• ◆Buffalo beetle / lesser mealworm — Alphitobius diaperinus (Tenebrionidae). This is the one this guide is about. A beneficial scavenger, a small feeder, a bioactive cleanup organism. Not a fabric or pantry pest.
• ◆Carpet beetle — Anthrenus and Attagenus spp. (Dermestidae). A genuine household pest. The larvae eat wool, silk, fur, feathers, leather, and stored dry goods. If something is eating holes in your sweaters, that's a carpet beetle, not a buffalo beetle. They look superficially similar (small, oval, mottled), which is the entire source of the confusion.
• ◆Hide / dermestid beetle — Dermestes maculatus (Dermestidae). This is the beetle museums and taxidermists use to strip soft tissue off skeletons. It is also not a buffalo beetle, even though some articles wrongly label buffalo beetles as "Dermestes" or "dermestid beetles." They're in a different family and do a different job.

I'm being pedantic on purpose, because a lot of source material — including articles with "ultimate guide" in the title — flatly mislabels buffalo beetles as dermestids and even gives them the wrong scientific name. They are darkling beetles, family Tenebrionidae, period. If a care sheet tells you your buffalo beetles will clean a skeleton or eat your carpet, it has them confused with a different animal.

Buffalo beetles vs. the beetles they get confused with

Keep this table in your head and you've already avoided the mistake 90% of people make with this animal.

Why keepers actually use buffalo beetles

I run buffalo beetles for two distinct reasons, and it's worth being clear about which job you want, because it changes how you keep them.

Reason one: a bioactive cleanup crew. In a bioactive enclosure — a vivarium with live "janitor" invertebrates that process waste so you rarely have to spot-clean — buffalo beetles are a heavy-duty scavenger. Springtails handle mold and microscopic stuff; isopods handle decaying plant matter and frass; buffalo beetles go after the bigger, tougher messes: shed skin, dead or dropped feeder insects, uneaten food, and concentrated frass. They're faster and more aggressive eaters than springtails and they reproduce quickly, so they keep a dry enclosure genuinely clean.

Reason two: a small feeder. The larvae (buffalo worms) are a nutritious, soft-bodied, bite-sized feeder ideal for small insectivores — dart frogs, small geckos, juvenile lizards, and picky eaters that respond to tiny wriggling prey. They're not a staple the way a roach or a properly sized mealworm is, but as a variety feeder and an enrichment item they're excellent, and a culture you keep for cleanup duty produces feeders as a free byproduct.

The reason this species is special is that one culture does both jobs at once. You keep a bin, it cleans up after itself and produces a continuous supply of larvae, and you crop those larvae either to feed your animals directly or to seed cleanup crews into other enclosures. That dual-use efficiency is the real reason experienced keepers bother with them.

A word on the framing the title carries — "natural pest control." In agriculture, Alphitobius genuinely does suppress some nuisances (it eats fly eggs and larvae in poultry litter and helps dry out manure). But in the hobby, the honest framing is cleanup crew and feeder, not "release them to control pests." Buffalo beetles are not a targeted predator you deploy against a specific bug; they're a scavenger that keeps an environment clean. I'll keep the rest of this guide grounded in that truthful, hobby-accurate use.

It's also worth correcting a second common overstatement: that buffalo beetles "actively hunt and eat pests." They don't hunt. They're scavengers and opportunistic feeders. The reason a buffalo beetle population reduces flies in a poultry barn isn't that the beetles chase down flies — it's that the larvae consume fly eggs and tiny maggots in the litter, dry out the manure that flies breed in, and out-compete those pests for the same organic resources. That's competition and incidental consumption, not predation. The distinction matters because it tells you what to expect in your own setup: buffalo beetles will keep an enclosure clean and crowd out the organisms that thrive in filth, but they're not going to solve a live infestation of, say, mites on your animal. For that you need a targeted approach, not a scavenger.

The bioactive cleanup-crew role in detail

If you're adding buffalo beetles to a vivarium, here's how to do it well.

Where they fit

Buffalo beetles are a dry-to-moderate cleanup organism. They thrive in the same conditions that suit a desert or savanna bioactive build — think leopard gecko, bearded dragon, uromastyx, or a temperate setup — far better than a soaking-wet tropical rainforest tank. In a constantly damp tank the substrate sours, mold blooms faster than they can manage, and the population dynamics get weird. For wet tropical builds, isopods and springtails are the better backbone; buffalo beetles are a specialist for the drier end.

Within a dry bioactive enclosure, layer your crew:

• ◆Springtails for mold and the microscopic film.
• ◆Isopods (a dry-tolerant species like Porcellio or Armadillidium) for plant matter, frass, and general decomposition.
• ◆Buffalo beetles for the heavy stuff — shed skin, dead feeders, protein-rich waste — that the smaller crews work through slowly.

You can source a balanced starter crew and substrate from a bioactive supplies collection rather than trying to assemble each organism separately; getting the mix right out of the gate saves you months of rebalancing.

Seeding the enclosure

Here is the discipline that separates a clean enclosure from an infestation: seed small. Don't dump a whole feeder tub of buffalo worms into your vivarium. Add a modest starter portion — a small scoop of mixed larvae and a few adults — and let them establish at the pace your enclosure's waste output can support. The amount of frass and shed your animal produces is the food cap; if you add more beetles than there's waste to feed them, they'll either starve back down or start looking for food they shouldn't, like soft enclosure materials or, in the worst case, a vulnerable animal.

A balanced cleanup crew is self-limiting through food supply. Seed it light, let it find its own level against the available waste, and top up only if you genuinely see waste accumulating.

What they will and won't clean

They will eat: shed skin, frass, dead feeder insects, escaped/dropped feeders, uneaten produce and protein, mold-softened organic matter. They will not meaningfully process: live healthy plants (they're not plant-eaters, so your pothos is safe), and they're not a substitute for occasional deep cleaning or proper ventilation. A cleanup crew reduces maintenance; it doesn't eliminate husbandry.

Buffalo worms as a feeder

Now the feeder side. When you crop larvae out of a culture, you've got buffalo worms — and they're a genuinely good small feeder if you use them for what they are.

Who they're for

Buffalo worms are small (well under half an inch as larvae), soft-bodied, and they move in a way that triggers feeding responses in animals that ignore static food. That makes them ideal for:

• ◆Dart frogs and other small amphibians that need tiny prey.
• ◆Small geckos — day geckos, mourning geckos, small juveniles.
• ◆Hatchling and juvenile lizards still too small for full-size mealworms or roaches.
• ◆Finicky eaters that need a wriggling stimulus.

They're a supplement and variety feeder, not a staple. They're too small to efficiently power a bearded dragon's diet, and like all darkling larvae they shouldn't be the whole menu.

Nutrition — and the calcium catch

Buffalo worms are a high-protein, moderate-fat soft larva — broadly comparable to a small mealworm, and softer-shelled (less chitin) than an adult mealworm or a superworm, which makes them easier to digest. Their weakness is the same as nearly every feeder insect: a poor calcium-to-phosphorus ratio (phosphorus-heavy). That means you dust them with a calcium supplement before feeding, every time your animal's care requires it, no matter how well you gut-load. Gut-loading improves the package; dusting fixes the calcium gap. Do both.

Here's roughly how buffalo worms stack up against the feeders you'd rotate them with. Treat these as approximate, as-fed figures — real numbers swing with diet, life stage, and source — but the relationships are reliable and they're what should drive your choices:

The takeaway: buffalo worms slot in next to mealworms as a small soft feeder — handy for tiny animals and variety, fat-moderate so not for daily bulk feeding, and never a calcium source on their own. For a staple base, a roach colony does more work; buffalo worms are the supporting cast.

Feeding buffalo worms off, by animal

Where care guides usually go vague is on who actually gets these and how often. Concretely:

• ◆Dart frogs and small amphibians. This is arguably their best use. Tiny, soft, and wriggling — perfect for froglets and small dart frogs that need movement to trigger feeding. Dust with a fine calcium/vitamin powder and offer a small number every feeding, sized so the frog can swallow them easily.
• ◆Small geckos (day geckos, mourning geckos, juvenile leopard/crested geckos). A few larvae per feeding, sized to no longer than the space between the animal's eyes. Dust with calcium; alternate with other feeders so they're variety, not the whole diet.
• ◆Hatchling and juvenile lizards. Useful as a bridge feeder when an animal is too small for full-size mealworms or roach nymphs. Offer in a shallow dish or by hand so you can count what's eaten and dust reliably.
• ◆Insectivorous fish, birds, and inverts. Buffalo worms are also a known treat for some fish, soft-billed birds, and invertebrate pets. As always, size to the animal and treat them as a supplement.

The universal rule is the same as for any feeder: size the larva to the animal, dust with calcium, and keep them as variety rather than the entire menu. Their soft bodies make them gentle on digestion, but their small size and moderate fat mean they shine as a supplement, not a foundation.

Setting up a buffalo beetle culture

This is the heart of the guide. A buffalo beetle culture is one of the easiest invertebrate cultures to run — closer to a mealworm bin than a tropical roach colony — but a few details make the difference between a clean, productive culture and a dusty, mite-ridden mess.

The container

Use a plastic storage bin — opaque is fine and they don't care about light the way roaches do, but a clear bin lets you monitor without opening it. For a working culture, something in the 6–16 quart range is plenty; you can scale up later. Critically, the adult beetles can fly in warm conditions and the small larvae can climb textured surfaces, so containment matters more than it does with flightless feeders:

• ◆Use a tight-fitting lid with ventilation cut into it and covered with fine metal mesh, hot-glued in place. Fine metal mesh (not plastic, which larvae chew, and not coarse screen the small stages walk through) breathes while keeping every life stage in.
• ◆Smooth high walls help with the larvae, but the lid is your real defense against flying adults. Don't run a buffalo beetle culture in an open or loosely-covered tub.

This flight ability is also why you keep cultures away from the parts of your house where an escapee would matter, and why I never recommend "just letting them loose" anywhere you can't tolerate the occasional beetle.

Substrate / bedding

The substrate is also the food base, exactly like a mealworm bin. Use a 2–4 inch layer of dry grain bran — wheat bran is the classic, oat bran or a ground chicken-feed/grain mix also work. This serves three jobs at once: bedding, primary food, and a medium for the larvae to move and pupate in.

Keep it dry. Damp bran is the number-one cause of buffalo beetle culture failure — it grows mold and grain mites and sours fast. The bran should feel dry to the touch at all times; all of your moisture comes from produce (below), never from wetting the substrate.

Add a few pieces of egg-crate cardboard or paper towel tubes on top for surface area, hiding, and pupation sites. Replace them when soiled.

Temperature

Buffalo beetles breed best warm: 80–88°F (27–31°C). They'll survive and slowly reproduce at room temperature, but warmth is the main lever on how fast the culture produces. If your room runs cool, mount a heat mat on the side or under one end of the bin, run through a thermostat set around 85°F. A thermostat is non-negotiable with bottom or side heat — an unregulated mat will cook a dry bin fast. Leave part of the bin off the heat so there's a gradient.

If you specifically don't want explosive production — say you're running a small culture just to feed a cleanup crew — keeping them at cooler room temperature is a legitimate way to throttle them.

Humidity

This is where buffalo beetles differ sharply from a tropical roach or a hornworm: they want it dry. Aim for roughly 40–60% relative humidity, and let the substrate stay dry. All moisture comes from food, not from misting or wet bedding. Too much moisture is the enemy here — it brings mold and mites and crashes cultures. A cheap hygrometer takes the guesswork out, but honestly, "the bran is dry and the bin doesn't smell" is the practical test.

Feeding the culture (and gut-loading)

The dry bran base feeds the colony continuously. On top of that:

• ◆Produce for moisture and nutrition. A few times a week, add small pieces of carrot, potato, sweet potato, apple, or leafy greens. This is the colony's water source — it's how you hydrate a culture without ever wetting the substrate. Add only what they finish in a day or two and remove anything before it molds. Wet, rotting produce sitting in the bin is how cultures crash.
• ◆A protein boost, occasionally. A pinch of high-quality dry pet food, fish flakes, or a commercial insect chow now and then supports faster growth and breeding. Don't overdo protein — excess uneaten protein fouls the bin and, in a cleanup-crew context, drives the population higher than you want.

Gut-loading before you feed off: for 24–48 hours before harvesting buffalo worms to feed, give the culture rich produce and a little protein. The larvae you pull will be packed with nutrition the moment your animal eats them. This habit does more for your pet's health than most supplements — pair it with calcium dusting and you've covered both the gut contents and the calcium gap.

The life cycle and breeding

Buffalo beetles run a fast, continuous cycle, which is their great strength as a culture and their main hazard as a cleanup crew.

Adults lay eggs into the bran. Eggs hatch into tiny larvae (buffalo worms) that feed and grow through several molts. Mature larvae pupate — the pupae are pale, immobile, and easy to mistake for dead until they darken and eclose into new adult beetles. The whole egg-to-adult cycle runs roughly 6–10 weeks in warm conditions, faster when hot and well-fed, much slower when cool.

What this means in practice:

• ◆A warm, fed culture produces continuously, with all life stages present at once. You'll always have larvae to crop.
• ◆You don't need to do anything special to breed them — give them warmth, dry bran, and produce, and they breed on their own. If anything, the work is restraining them.
• ◆Pupae are delicate. When you're digging for feeders, try not to crush the pale pupae if you want maximum production — they're your next generation of beetles.

To intentionally start a new culture, just split a thriving one: scoop a few cups of bran-with-larvae-and-beetles into a fresh bin with new bran and produce, and it'll establish itself.

A few breeding details worth knowing:

• ◆Temperature controls everything. Like all darkling beetles, buffalo beetles are ectothermic and their entire development rate scales with heat. The same culture that takes ten weeks egg-to-adult at room temperature can run that cycle in six weeks in the mid-80s. This is your master dial: warm to multiply, cool to slow. There's no separate "breeding trigger" to manage — no humidity cycling, no diapause, no light schedule. Just heat and food.
• ◆You don't need to sex them. Unlike a roach colony where you want to confirm you have both sexes, a buffalo beetle culture of any reasonable size already contains both. Buy a culture, not "a male and a female." The adults sort it out, and a productive culture is simply one with enough mature beetles and enough food.
• ◆Overlapping generations are normal and good. A healthy bin always shows you eggs you can't see, larvae of every size, pale pupae, and dark adults simultaneously. That overlap is what gives you a continuous feeder supply rather than boom-and-bust batches. If you ever see only one life stage, something has interrupted the cycle — usually a cold snap or a food gap.
• ◆Don't over-harvest the adults. The beetles are your egg-layers. If you're cropping feeders, take larvae, not adults. Strip out the beetles and you cut off production at the source.

Population control — the part people skip

I'm putting this in its own section because with buffalo beetles, managing the population is the whole job. Every problem people have with this species traces back to letting it run unchecked. They breed fast, the adults fly, and a culture that's allowed to boom will fill a bin and then go looking for somewhere else to be.

How I keep them in line:

• ◆Harvest regularly. Cropping larvae to feed off is the most natural population control there is. A culture you actively feed from stays balanced.
• ◆Cap the food. Don't keep a permanent buffet of protein and produce in the bin. Feed what they consume, let them be a bit hungry between feedings, and the population self-limits.
• ◆Keep it dry. Dry conditions slow reproduction; damp conditions accelerate it. Dryness is both a health measure and a brake.
• ◆Cool it down to slow it down. Dropping a culture to room temperature meaningfully throttles output if you don't need a lot of feeders.
• ◆In an enclosure, seed light and trust the waste cap. A bioactive crew is limited by available waste; don't overwhelm that natural ceiling by adding too many.

And the cautions that make this non-optional:

• ◆They can become a nuisance if they escape. Remember, this is the same species that's a documented pest in poultry barns. A few loose beetles in a reptile room are harmless; a breeding population loose in a building is a problem. Lid discipline matters.
• ◆In huge numbers they chew soft materials. Established buffalo beetle populations are known to bore into insulation, foam, and similar soft materials. In a vivarium that means a foam background can take damage if the population explodes.
• ◆Don't run them with vulnerable animals. Healthy adult reptiles are fine. But a dense population of hungry larvae and beetles can nip at a sick, injured, or freshly-hatched animal that can't move away. Only keep them as a cleanup crew with animals that can defend themselves, and keep the numbers reasonable.

None of this is a reason to avoid them — it's a reason to keep them deliberately. A controlled buffalo beetle culture is clean, productive, and trouble-free. An ignored one is how the "buffalo beetles are a pest" articles get written.

Adding buffalo beetles to a bioactive enclosure: step by step

Pulling the threads together, here's the actual workflow I use to put them into a dry bioactive build:

1. ◆Confirm the enclosure is dry-appropriate. Desert or temperate, well-ventilated, substrate not waterlogged. If it's a wet tropical tank, skip buffalo beetles and use isopods/springtails instead.
2. ◆Establish springtails and isopods first. Let the smaller, gentler crews get going for a few weeks so there's a baseline ecosystem.
3. ◆Seed buffalo beetles light. A small scoop of mixed larvae and a few adults — not a whole tub. You can always add more.
4. ◆Let waste output set the population. Don't supplement their food inside the enclosure; the animal's frass, shed, and dropped feeders are their food. This keeps the population self-limiting.
5. ◆Monitor for a few weeks. You should see the enclosure staying cleaner and the beetle numbers settling. If beetles are visibly everywhere and climbing walls, you've overpopulated — scoop some out and check that you're not over-feeding the tank.
6. ◆Keep a separate culture for feeders. Don't crop your in-enclosure crew for food; run a dedicated bin for that so your cleanup population stays stable.

Maintenance rhythm

A buffalo beetle culture is genuinely low-effort. My routine:

• ◆Every few days: add a small piece of fresh produce; remove any old produce before it molds.
• ◆Weekly: glance for mold, mites (tiny tan specks crawling on damp food are grain mites and mean it's too wet), and overall activity. Healthy beetles are active and glossy; lethargy and odor mean something's off.
• ◆As needed: replace soiled cardboard hides; top up bran as the larvae eat it down and it turns to fine frass/dust.
• ◆Every few months: sift the culture. Old bran eventually becomes mostly frass and shed skins ("spent" substrate); sift out the beetles and larvae, give them fresh bran, and you've reset the culture. The spent frass is a nice amendment for a bioactive substrate or a houseplant if you want to use it.

Don't over-clean — like any darkling culture, a little frass and shed is normal and the larvae feed in it. You're managing moisture and food, not sterilizing.

Troubleshooting

Work the likely causes in order:

• ◆Culture not producing / slow: almost always too cold. Check the temperature in the bin first — aim for the mid-80s. Then check that there's enough food and that you have actual adults (not just larvae) present to lay eggs.
• ◆Mold or grain mites: the bin is too wet. Pull all produce, let the bran dry out, improve ventilation, and if it's bad, sift the colony into fresh dry bran. Dryness fixes nearly every mite and mold problem with this species.
• ◆Bad smell: wet substrate, rotting produce, or too much uneaten protein. Dry it out and remove old food. A healthy culture barely smells.
• ◆Population exploding / beetles everywhere: you're feeding too much, it's too warm and wet, or (in an enclosure) you over-seeded. Cut food, dry it, cool it, and harvest hard until it settles.
• ◆Escapees: check your lid mesh — adults fly and small larvae climb. Re-mesh any gap with fine metal mesh.
• ◆Sudden die-off: suspect an unregulated heat mat cooking a dry bin, or pesticide/chemical contamination (never use a bin that held cleaners, and keep them far from any fly spray or aerosol).

How buffalo beetles compare to other cleanup crews

It's worth being clear about when buffalo beetles are the right cleanup organism versus the alternatives, because they're a specialist, not a default:

• ◆vs. springtails: Springtails are gentle, tiny, mold-focused, and safe in any enclosure including the wettest. Buffalo beetles are heavier-duty and handle bigger waste, but they're dry-leaning and need population management. Run springtails everywhere; add buffalo beetles in dry builds for the tough jobs.
• ◆vs. isopods: Isopods are the workhorse cleanup crew across most enclosures, with dry-tolerant and moisture-loving species for any setup, and they're far less prone to overrunning or becoming a household nuisance. Buffalo beetles process protein-rich waste (shed, dead feeders) faster, but they carry more management overhead. Isopods are the safer backbone; buffalo beetles are a powerful specialist.
• ◆vs. dermestid beetles: Different animal entirely — dermestids are for cleaning skeletons, not for live vivaria. Don't substitute one for the other.

My rule of thumb: in a dry desert-style bioactive setup with an animal that can defend itself, buffalo beetles are an excellent addition alongside springtails and isopods, kept in deliberate check. In a wet tropical tank, leave them out.

Sourcing a culture

Two habits keep a culture healthy long term:

1. ◆Start with a clean, healthy source. Buy from a supplier that keeps its cultures dry and mite-free. Look for active larvae across a range of sizes and glossy, lively adults — not a damp, sour, mite-dusted tub. A good starter culture saves you months.
2. ◆Quarantine before mixing. If you're adding new stock to an existing culture, hold it separately for a couple of weeks and watch for grain mites and mold before merging. It's a small step that keeps you from importing a problem into a thriving bin.

A note on shipping and acclimation: buffalo beetles travel well — they're hardy and they ship in their own bran, so they tolerate transit better than soft, moisture-dependent feeders like hornworms. When a culture arrives, give it a day to settle in stable warmth before you start cropping or splitting it. Don't judge a fresh culture by how it looks the hour it lands; let it warm up, offer a small piece of produce, and check it the next day. A healthy culture rebounds to visible activity quickly.

The short version

Buffalo beetles are Alphitobius diaperinus, the lesser mealworm — a darkling beetle, not a carpet beetle and not a dermestid. Keep them in a dry bin of wheat bran with fine-mesh ventilation (the adults fly), run them warm (80–88°F) to produce or cool to throttle, feed produce for moisture and pull it before it molds, and manage the population relentlessly — harvest, cap the food, keep it dry. Use the larvae ("buffalo worms") as a small, dusted variety feeder for dart frogs, small geckos, and juveniles, and use the colony as a dry-bioactive cleanup crew alongside springtails and isopods — seeded light, with an animal that can defend itself. Do that and they're one of the most useful, lowest-effort little workers in the room. Ignore them and they earn the "pest" reputation the confused articles gave them. The difference is entirely in how deliberately you keep them.

Building out a feeder shelf or a cleanup crew? See my full playbook on keeping discoid roaches as a self-sustaining staple feeder, or browse the whole exotic-animal care library for more feeder and bioactive guides.