Chickens love insects. Dried black soldier fly larvae (BSFL) are a popular treat, sold by brands such as Grubblies. They’re often compared with mealworms. This review looks at their nutrition and how to use them.
Verdict at a Glance: Black soldier fly larvae treats are a high-protein snack that chickens enjoy. They’re often noted for having more calcium than mealworms. Like all treats, they should be a small part of the diet.
At a Glance
| Feature | Details |
|---|---|
| Type | Dried insect treat |
| Protein | High |
| Calcium | Higher than mealworms |
| Use | Treat or supplement |
| Brands | Grubblies and others |
What It Is and How It Works
BSFL are the larvae of the black soldier fly. Dried larvae are high in protein and fat, and they’re sold whole in bags or tubs. Chickens tend to love them, which makes them handy for training, calling hens back to the coop or encouraging foraging.
They’re often compared with dried mealworms. BSFL generally have more calcium than mealworms, which is a plus for laying hens. Both are high in fat, so portion size still matters.
BSFL are also farmed on food waste in some operations, which some owners see as a sustainability benefit. Check where your product comes from and how it’s processed.
Treats should be limited, even healthy ones. See what to feed backyard chickens.
Pros and Cons
| Pros | Cons |
|---|---|
| High protein | Can be fattening |
| Chickens love them | Costly in large amounts |
| More calcium than mealworms | Not a complete diet |
| Shelf-stable | |
| Useful for training |
Using Treats Wisely
Treats are fine in moderation, but too many dilute the balanced nutrition in complete feed.
- Keep all treats, including BSFL, to about 10% of the daily diet.
- Offer treats later in the day, after hens have eaten their regular feed.
- Scatter larvae on the ground to encourage scratching and foraging.
- Offer a bit more protein during molt, when hens regrow feathers.
- Cut back if hens are becoming overweight or laying less.
| Treat | Notes |
|---|---|
| BSFL | High protein, more calcium than mealworms |
| Dried mealworms | High protein and fat, low calcium |
| Scratch grains | Low protein, mostly energy |
| Leafy greens | Low calorie, good for boredom |
Things to Consider Before Buying
- Keep treats to about 10% of the diet.
- Store larvae sealed in a cool, dry place.
- Check the source and processing.
- Consider offering a bit more during molt.
- Watch your hens’ body condition.
Who It Suits
| Good fit if… | Consider something else if… |
|---|---|
| You want a high-protein treat hens love | Your hens are overweight |
| You use treats for training or foraging | You’re looking for a feed replacement |
| Your hens are molting |
Alternatives to Consider
| Option | How it differs |
|---|---|
| Mealworms | Similar treat |
| Scratch grains | Lower protein |
| Vegetable scraps | Low calorie |
When to Call Your Vet
Contact your vet if:
- Hens become overweight
- Hens stop laying
- Hens seem unwell
Frequently Asked Questions
Are BSFL better than mealworms for chickens?
Both are high-protein treats. BSFL generally contain more calcium than mealworms, which many owners see as an advantage for laying hens.
How many BSFL treats should I give my hens?
A small handful for a few hens is plenty. Keep all treats to around 10% of what your flock eats in a day.
Can chicks eat black soldier fly larvae?
Small amounts can be offered to older chicks, but chicks need starter feed for balanced growth. Make sure they have access to grit if they eat anything besides starter feed.
Do BSFL help during molt?
Molting hens need extra protein to regrow feathers. A few more protein-rich treats can help, but a higher-protein feed is usually the main tool.
Are BSFL treats safe for chickens?
They’re widely used and generally safe in moderation. Buy from reputable brands and store them properly to prevent mold.
How should I store dried larvae?
Keep them sealed in a cool, dry place. Throw them out if they smell off or look moldy.
Can BSFL replace layer feed?
No. They’re a treat, not a complete diet. Layer feed provides the balanced nutrition hens need.
Can I raise my own black soldier fly larvae?
Some flock owners raise BSFL in bins using kitchen scraps. It takes some setup and management, and the bin needs to stay clean to avoid odors.
Can BSFL cause hens to lay fewer eggs?
Not directly, but too many treats of any kind can unbalance the diet. If laying drops, check that treats are limited and that hens are eating their layer feed.
Pet Health Man is independent and isn’t paid by the brands we review. Product formulas, specifications and prices change, so check the current label or the manufacturer’s information before you buy.
This article is for general information only and isn’t a substitute for professional veterinary advice. If you’re worried about your pet’s health, contact your veterinarian or an emergency animal hospital.
