As someone who keeps backyard chickens, I can’t stand how gnats invade my chicken coop, especially during late spring and early summer when it seems like they’re everywhere. Buffalo gnats, black flies, and those pesky little biting insects are more than just an annoyance—they’re a nightmare for me and my flock.

These tiny predators don’t just irritate my chickens; they can cause real problems, from painful bites and chicken mites to the terrifying possibility of anaphylactic shock. It’s an ongoing battle that every poultry owner dreads, and I’m no exception!

Gray chicken hen on grass that is digging in her feathers

Why are Gnats Problematic?

First, let’s take a look at why gnats can be a problem in a chicken coop or run.

Stress and Discomfort for Chickens

Gnats and black flies swarm around chickens, causing constant irritation.
Chickens may resort to frequent scratching and flapping, which can stress them out and disrupt their natural behaviors like feeding, nesting, or dust bathing.

Painful and Harmful Bites

Certain gnats, like buffalo gnats or female black flies, bite chickens to feed on their blood.
These bites can lead to swelling, irritation, and sometimes open wounds, creating opportunities for infections.

Risk of Disease Transmission

Gnats and other biting insects can carry malaria-like diseases and other pathogens that harm the health of your flock.
They can also spread parasites like chicken mites and poultry lice, leading to long-term infestations.

Severe Allergic Reactions

Some chickens may experience anaphylactic shock from gnat bites, which can result in sudden death if not managed.
Chickens, especially younger or weaker ones, are more vulnerable to severe reactions.

Impact on Egg Production

Stress caused by gnats can reduce egg-laying consistency, affecting both the quantity and quality of fresh eggs.

Risk of Secondary Infections

Gnat bites can cause small cuts and wounds on the skin, which may become infected if left untreated.
These infections can lead to further complications, including abscesses or systemic illnesses.

Breeding Grounds for More Pests

If your coop or run has damp bedding, standing water, or unsanitary conditions, it becomes a breeding ground for gnats.
These conditions may also attract other pests like flies, mosquitoes, and rodents, creating more challenges for chicken keepers.

Serious Health Risks from Overwhelming Swarms

In extreme cases, large gnat swarms can cause asphyxiation by blocking chickens’ airways, especially in small or enclosed coops.
This is a rare but devastating consequence of unchecked gnat infestations.

Negative Impact on Chicken Owners

Gnats aren’t just a nuisance for chickens—they can also bother poultry owners, making routine care and time spent in the coop less enjoyable.

Close up of many dead midges and water droplets condensation on white metal-plastic window and windowsill indoors apartment. Problems with pests and high humidity

What Attracts Gnats?

Gnats are drawn to a variety of things, making chicken coops and runs a prime target if you’re not careful. They love moisture and standing water, which they use as breeding grounds. Puddles, wet bedding, or even a clogged water bowl can become a gnat magnet. Rotting organic matter like food scraps, compost piles, and even damp chicken droppings also provide the perfect environment for them to thrive.

These pesky insects are especially attracted to carbon dioxide, which chickens naturally exhale, and to sweet or fermenting smells like spilled chicken feed or rotting fruits. Add warm weather and poor ventilation to the mix, and you’ve created an ideal space for them to multiply. Even nearby lights can draw certain types of gnats closer to the coop.

To combat gnats, it’s essential to maintain a clean, dry environment around your flock. Regularly clean bedding, remove standing water, and properly store feed to reduce attractants. A little prevention goes a long way in keeping gnats from becoming a problem.

a flock of different color chickens inside a coop with a ladder and perches

How to Keep Gnats Out of Your Chicken Coop

Here are some natural ways to protect your coop and keep your chickens happy and healthy.

Maintain a Clean Environment

As mentioned, gnats and flies thrive in damp areas and stagnant water. To prevent breeding grounds:

Clean dropping boards and wet bedding on a regular basis.
Remove any standing water or food scraps that might attract flies.
Use hardware cloth or fine mesh screens to cover coop windows, ensuring adequate ventilation without inviting pests.

Incorporate Fresh and Dried Herbs

Fresh herbs like lemon grass, citronella plants, and bee balm are natural fly repellents. Plant these near your chicken yard for a great way to deter pests. Dried herbs can also be placed in nesting boxes and around the coop to repel different types of flies and creepy crawlies.

Essential Oils as Natural Remedies

Essential oils such as citronella, lavender, or eucalyptus are a good idea for repelling gnats and flies. Create a homemade spray by combining a few drops of your preferred essential oil with a carrier oil like coconut oil or water in a spray bottle. Spray this mixture around the coop (not directly on the chickens) and near dust bath areas.

Use Fly Traps and Predators

Sticky traps and fly traps baited with fly attractants are effective for managing fly populations. You can also introduce fly predators, which are tiny insects that consume fly larvae, reducing their numbers significantly.

Utilize Natural Fly Deterrents

Diatomaceous earth or First Saturday Lime sprinkled around damp areas and the coop is effective in killing insects while being safe for your flock.
Water bags hung around the coop can confuse and deter flies with their reflections.
Apple cider vinegar traps are another great way to catch flies. Simply fill gallon jugs with water and vinegar to attract and trap them.

Protect Your Chickens

Buffalo gnats and black flies are aquatic insects that are drawn to carbon dioxide and chicken blood. They can cause constant scratching, small cuts, or worse—malaria-like diseases or sudden death in extreme cases. To minimize their impact:

Cover the coop with mosquito netting during heavy infestations.
Allow your flock enough time to free range in open areas with fewer gnats.
Consider adding guinea fowl to your flock, which are natural hunters of buffalo gnats and turkey gnats.

Pay Attention to Nesting Boxes and Dust Baths

Keeping nesting boxes clean and providing a proper dust bath area for your chickens can prevent chicken mites and poultry lice infestations. Add a little bit of diatomaceous earth or First Saturday Lime to the dust bath area for an added layer of protection.

Be Mindful of Food Sources

Gnats and flies are drawn to chicken feed and compost piles. Store feed in airtight containers and ensure the compost pile is far from the coop. This helps maintain healthy chickens and fresh eggs while reducing pest problems.

Bottom Line

Keeping your chicken coop free from gnats, flies, and other pests takes effort but is worth it for the health of your flock. By using natural methods like fresh herbs, essential oils, and good coop management practices, you can go a long way in ensuring a pest-free environment. Good luck, chicken keepers, and here’s to much fun with your backyard chickens and healthy, happy flocks!

What questions do you have? Let me know in the comments!

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Keep Gnats Out of Your Chicken Coop: Natural Remedies and Essential Tips