Feeding Live Silkworms to Bearded Dragons: The Full Guide

To feed live silkworms to a bearded dragon, source them from a reputable breeder, select worms no wider than the space between your dragon’s eyes, and offer them in a shallow dish 1-3 times per week as part of a varied insect diet. Juveniles can have 3-5 per day, adults 4-6 per meal.

Most owners get the frequency wrong. They see their dragon devour silkworms with enthusiasm and assume more is always better. This turns a premium feeder into a dietary crutch that lacks the complete protein profile and chitin exposure dragons need from a rotation of other insects.

This guide walks through the exact quantities for each life stage, the proven method to introduce them to a picky eater, and the single storage mistake that kills an entire batch overnight. You’ll also learn when to skip the calcium dust and why the enzyme inside a silkworm matters more than its fat content.

Key Takeaways

• Silkworms are a low-fat, high-moisture supplemental feeder, not a staple. They should comprise only 10-30% of your dragon’s weekly insect intake.
• The prey size rule is non-negotiable: any silkworm wider than the space between your dragon’s eyes is an impaction risk.
• Never refrigerate live silkworms. Store them at 72–82°F in a ventilated container with fresh mulberry chow, removing old food to prevent mold.
• For picky or recovering dragons, use feeding tongs to gently wiggle a silkworm to trigger a hunting response, their slow movement and soft body are often irresistible.
• Adjust your supplementation schedule: you can skip calcium dusting on days where silkworms are the primary insect, but maintain your standard multivitamin routine.

Why Silkworms Are a Superior Supplemental Feeder

Head design changes the entire process. Look at the business end of your trimmer. Most bump-feed heads share a common spool and spring mechanism, but the housing shape and exit hole count change how you load the line. A two-hole head requires equal lengths threaded through opposite sides; a single-hole head uses a folded line fed through a center channel.

The wrong line diameter jams the mechanism every time. It’s printed on the head itself.065″.080″.095″. Using a thicker line than specified creates friction heat, melts the nylon inside the spool chamber, and seizes the head. You’ll smell burning plastic before the auto-feed stops working.

Silkworms (Bombyx mori) provide approximately 9% protein, 1% fat, and 83% moisture on an as-fed basis, with a calcium-to-phosphorus ratio near 1:1.4. Their soft, chitin-free bodies and slow movement make them highly digestible and suitable for bearded dragons of all ages, including juveniles and convalescent individuals.

You’ll find conflicting claims about their fat content. Some outdated care sheets label them as high-fat. Modern nutritional analysis from reputable breeders confirms they are one of the leanest feeder insects available, with a fat content around 1%. That makes them an excellent choice for adult dragons prone to obesity, where you might rotate them in place of waxworms or superworms.

Their real value lies beyond basic macros. Silkworms produce an enzyme called serrapeptase. This enzyme has natural anti-inflammatory properties. When your dragon digests the silkworm, it gets a small, beneficial dose that can aid in reducing soft tissue swelling. It’s a minor perk, but a tangible one for an animal recovering from injury or showing signs of gout.

TL;DR: Silkworms are low-fat, water-rich, and easy to digest because they lack hard chitin and contain a beneficial enzyme. They are a supplement, not a staple.

How Many Silkworms Should You Feed?

Wind direction decides whether the head feeds or jams. An arrow stamped on the spool indicates the winding direction. Wind the line opposite this arrow, and the feed mechanism won’t engage when you tap the head, the line stays locked inside. Wind with the arrow, and each bump releases the correct length.

Portion size depends on your dragon’s life stage and overall diet. Silkworms are a component, not the entire meal. This table breaks down the weekly schedule.

Dragon Life Stage	Silkworms Per Meal	Frequency	% of Weekly Insect Diet
Hatchling (0-3 months)	3-5 small worms	Daily, across meals	20-30%
Juvenile (3-12 months)	4-6 medium worms	3-4 days per week	20-30%
Sub-Adult (12-18 months)	3-4 large worms	2-3 days per week	15-25%
Adult (18+ months)	4-6 large worms	1-2 days per week	10-20%

A hatchling can have a few small silkworms split between its two or three daily insect feedings. An adult might get a serving of 4-6 as its sole insect offering on a Tuesday, then eat dubia roaches or crickets the rest of the week. This variety is crucial.

Common mistake: Feeding silkworms every day, this displaces other essential feeders like dubia roaches or crickets, leading to a protein deficiency and lack of dietary chitin within 3-4 weeks. Your dragon’s growth will slow and its stool may become loose.

I learned this the hard way with a juvenile dragon named Ember. She adored silkworms and refused crickets. After two weeks of a silkworm-heavy diet, her weight plateaued and her energy dipped. Reintroducing crickets was a battle, but her growth and activity returned to normal within ten days. Now silkworms are a Wednesday treat.

The totals above are guidelines. A particularly active, large-breed dragon might handle the upper limit. A sedentary, older dragon should stay at the lower end. Always observe your dragon’s body condition and adjust.

TL;DR: Feed juveniles silkworms 3-4 times weekly, adults 1-2 times. They should never make up more than 30% of the total insect diet.

The Right Way to Source and Store Live Silkworms

Press the tabs to remove the spool. Most heads have two plastic tabs on the sides of the housing. Pinch them inward simultaneously while pulling the spool assembly straight out. Forcing it breaks the tabs and the head won’t seat properly again, you’ll get vibration and uneven line feed.

Your silkworm source is your first line of defense against parasites. Never collect caterpillars from your garden. Wild insects carry pesticide residues, plant toxins, and internal parasites that can devastate a reptile. Always purchase from a dedicated feeder insect breeder with positive reviews within the reptile community.

Once you have your batch, storage is simple but specific. Silkworms are not like mealworms. They are tropical larvae and cold kills them.

• Keep them at room temperature, ideally between 72–82°F.
• House them in a well-ventilated plastic container (a deli cup with air holes works).
• Feed them a slice of commercial mulberry chow every other day.
• Remove any uneaten, dried-out, or molded chow immediately.
• Do not add leafy greens or fruits, this introduces moisture and causes fatal mold.

Refrigeration is a death sentence. I once made the mistake of putting a cup of silkworms in the fridge for an hour, thinking it would slow them down. Half were dead by the next morning; the survivors were lethargic and refused food. Room temperature only.

A batch of small silkworms will last about two to three weeks before they begin to pupate. Plan your purchases accordingly. Buying in bulk only makes sense if you have multiple insect-eating reptiles.

Step-by-Step Feeding Guide

Follow the right sequence and the swap takes five minutes. After removing the old spool, clear any debris or wrapped line from the spindle. A small pick or straightened paperclip works. Ignoring this step lets old line fragments bind the new spool.

Before you start: Always wash your hands before and after handling feeder insects or your dragon. Use feeding tongs to offer silkworms, bearded dragons have poor depth perception and can mistake a wiggling finger for food, leading to a painful bite. If you are bitten, clean the wound thoroughly with soap and water.

1. Select and prepare the worms. Choose silkworms that pass the eye-width test. If you practice gut loading insects, ensure they’ve been fed fresh mulberry chow for at least 24 hours prior. This indirect supplementation boosts their nutritional value for your dragon.
2. Set up the feeding area. Place a shallow, smooth-sided ceramic dish in the enclosure. This prevents the worms from crawling away and stops your dragon from ingesting substrate like sand or mulch. For a comprehensive look at other best live foods, this practice is standard.
3. Offer the silkworms. For most dragons, simply placing 3-6 worms in the dish is enough. For a hesitant dragon, use reptile feeding tongs to gently pick up a worm and wiggle it in front of its nose. The movement triggers the hunting instinct. This technique is also covered in our general feeding practices guide.
4. Observe the feeding. Let your dragon eat at its own pace. Silkworms move slowly, so there’s less panic than with crickets. Remove any uneaten worms after 15 minutes to prevent them from hiding or stressing your dragon.
5. Adjust supplementation. This is the step most people miss. Silkworms have a better native calcium ratio than crickets. If the meal is primarily silkworms, you can skip the calcium dusting practice for that feeding. Do not skip your scheduled multivitamin dusting day.

Silkworms vs. Other Common Feeders

Bamboo vs steel needles: bamboo wins on slippery yarns like silk because the surface friction stops dropped stitches. Steel wins on cotton because you need the slick tip to power through tight loops. Mixing is a beginner mistake.

Every feeder insect has a role. Silkworms are the precision tool, not the workhorse. This comparison shows where they fit.

Feeder Insect	Best For	Risk If Overused	Silkworm’s Edge
Dubia Roaches	Staple protein, growth	Can be protein-dense for sedentary adults	Higher moisture, softer body
Crickets	Encouraging activity, chitin source	Parasite risk, noisy, can bite	No chitin, easier digestion
Black Soldier Fly Larvae	Automatic calcium source	Small size, can be boring for dragons	Larger, more stimulating prey
Superworms	Occasional treat, weight gain	High fat, addictive, impaction risk	1% fat vs. 20% fat

Silkworms complement a diet built around dubia roaches or crickets. They provide hydration and a different texture. They are particularly useful when you need to administer medication, a silkworm can be a perfect pill pocket.

For a full breakdown of other options, see our guide on the best feeder insects and staple insect feeders.

I prefer silkworms over waxworms for a recovering dragon. Not because they’re more nutritious, they are, but because a waxworm is pure fat and can kill a sick dragon’s appetite for anything else. A silkworm stimulates feeding without the addictive grease.

Troubleshooting: When Your Bearded Dragon Refuses Silkworms

The puck-prep ritual is correct, but it takes a couple of weeks to feel the right tamping pressure. Your first dozen shots will channel and run fast. That’s fine.

Some dragons are suspicious of new food. If yours ignores the silkworms in the dish, don’t assume it dislikes them. Try these steps in order.

• Wiggle it. Use tongs to mimic live movement. This is often enough.
• Crush the head. Gently pinch the silkworm’s head with the tongs to release a tiny bit of internal fluid. The scent can be irresistible.
• Mix feeders. Place one silkworm among a few of your dragon’s favorite roaches. It might eat it by accident and acquire the taste.
• Check the temperature. A cold dragon won’t eat. Ensure your basking spot surface temperature is 100-110°F for adults, 105-115°F for juveniles.
• Try a different size. A worm that’s too large can be intimidating. Order a smaller size next time.

Persist for three or four feeding attempts before giving up. Consistency matters. If after two weeks there’s still no interest, silkworms might not be for your particular dragon. That’s okay. The reptile keeper’s toolbox includes many other nutritious worm options.

Common mistake: Assuming a refusal means the silkworms are “bad”, often the dragon is simply not hungry, is nearing a shed, or is stressed by a change in its environment. Offer them again in a week under normal conditions.

Supplementation and Health Considerations

The line is sold in 50-foot lengths. You’ll use about 20 feet for a full respool on a medium-sized bump-feed head. Cutting too short forces a redo halfway through the job; cutting too long wastes line and can cause tangling inside the chamber.

Silkworms improve the calcium math, but they don’t solve it. Their natural Ca:P ratio is about 1:1.4. The target for a growing bearded dragon is 2:1. This means you still need a supplementation strategy, but you can modify it on silkworm days.

• On days where silkworms are the only insect feeder, you can skip dusting them with calcium powder. Their native ratio is superior to a dusted cricket.
• Maintain your multivitamin schedule. Whether you dust one feeding per week or use a specific schedule, keep it. Silkworms don’t provide the full spectrum of vitamins like A, B, and E that a quality multivitamin powder does.
• For all other insect feedings, continue your standard calcium dusting practice 5-6 days a week. This is non-negotiable for preventing Metabolic Bone Disease.

Their high moisture content (83%) is a major benefit for hydration, especially for dragons that are poor drinkers. However, it also means their nutritional profile is “diluted” compared to a drier insect. This is another reason they can’t be the sole feeder, your dragon would need to eat a volume too large to get enough protein.

Always monitor your dragon’s stool after introducing any new feeder, including silkworms. A temporary change in consistency is normal. Persistent loose stool or signs of straining could indicate an issue with the size or source of the worms.

Frequently Asked Questions

Can bearded dragons eat silkworms every day?

No. A daily silkworm diet lacks sufficient protein density and dietary chitin, leading to nutritional imbalances. They are a supplemental feeder, best offered 1-4 times per week depending on the dragon’s age.

Do I need to dust silkworms with calcium?

Usually not. Silkworms have a better natural calcium-to-phosphorus ratio than most common feeders. If the meal is primarily silkworms, you can skip the calcium dust for that feeding. Always maintain your regular multivitamin schedule.

Why did my silkworms die overnight?

The two most common causes are exposure to cold temperatures (never refrigerate them) or mold from spoiled mulberry chow. Keep them at room temperature (72-82°F) in a ventilated container and remove old food daily.

Are silkworms or hornworms better?

They serve similar purposes as hydrating, low-fat supplements. Hornworms have even higher moisture content (85%) and grow extremely fast, making portion control harder. Silkworms have more protein and the benefit of the serrapeptase enzyme. Both are excellent in rotation.

Can baby bearded dragons eat silkworms?

Yes, they are an excellent starter feeder due to their soft bodies and easy digestibility. Feed hatchlings 3-5 very small silkworms per day, ensuring each worm is narrower than the space between the baby’s eyes.

Where is the best place to buy live silkworms?

Purchase from reputable online feeder insect breeders that specialize in reptile nutrition. Avoid general pet store chains where the insects may be older or poorly gut-loaded. Look for breeders who ship quickly and guarantee live arrival.

The Bottom Line

Silkworms are a premium tool in your feeder insect kit. Their value lies in their hydration, digestibility, and unique enzyme profile, not as a daily staple. Stick to the 10-30% weekly rule, respect the eye-width size limit, and never let them displace a varied diet built around dubia roaches or crickets.

Store them at room temperature with fresh chow. Use a shallow dish and tongs to feed. Adjust your calcium powder routine on the days they are the main attraction. When introduced correctly, they can boost hydration, aid recovery, and entice the pickiest of eaters. For the full context of how this fits into essential bearded dragon care, including habitat setup and maintenance, consistency across all aspects of husbandry is what keeps your dragon thriving.