How to Keep Flies Out of the Chicken Coop
If you’re raising backyard chickens, you’re likely familiar with the seasonal battle of trying to control the fly population in and around the chicken coop. Flies can become a serious problem, especially during the warm and humid days of the summer months. Aside from being a nuisance, flies can pose health risks to your chickens, causing respiratory problems and stress. Fortunately, there are different ways to tackle this issue naturally and effectively, ensuring a comfortable environment for your flock. Below, we’ll explore some of the best ways to keep your coop fly-free.

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Health Risks Flies Pose to Chickens
Flies pose several health risks to backyard chickens, making it essential to manage their population around your coop and chicken yard. Here are the primary health concerns associated with flies.
Disease Transmission
Flies can carry and transmit various diseases to chickens. As they move between rotting materials, feces, and food sources, they pick up pathogens that can lead to infections in chickens.
- Salmonella: Flies can transmit this bacterial infection, which can cause diarrhea, weight loss, and lethargy in chickens.
- Avian Influenza: While rare, flies can potentially carry the virus from contaminated areas to your flock.
- Fowl Cholera: A bacterial infection that can be spread through contaminated food or water by flies.
Stress and Feather Loss
Flies can irritate chickens, leading to stress, agitation, and discomfort. Chickens may spend more time trying to avoid or get rid of the flies, reducing their time spent eating and resting. Prolonged exposure to flies can result in:
- Feather loss due to pecking and scratching.
- Decreased egg production due to stress.
Respiratory Problems
Flies are attracted to moist environments, including chicken droppings. If flies are abundant in the coop, they can contribute to the buildup of ammonia in the air, particularly from decomposing feces. This leads to poor air quality and can cause respiratory problems.
- Coughing and sneezing.
- Infectious bronchitis or other respiratory infections.
Contamination of Food and Water
Flies often land on food and water sources, contaminating them with pathogens. This contamination can lead to:
- Digestive issues like diarrhea or crop infections in chickens.
- The potential spread of harmful bacteria reduces the overall health of the flock.
Parasitic Fly Species
Certain flies, such as the black fly or biting flies, are not only an irritant but can also feed on the blood of chickens, leading to anemia or even death if the infestation is severe. Bites from parasitic flies can also cause open sores, which increase the risk of infections.
Weakened Immune System
The stress and potential malnutrition caused by a serious fly infestation can weaken chickens’ immune systems, making them more susceptible to other diseases and infections.
Attraction of Other Pests
Flies can attract other pests such as mites, lice, and rodents. An influx of pests increases the likelihood of further infections and stresses on the chickens, worsening the overall health situation in the coop.
Fly Larvae Infestations (Myiasis)
Some flies, like blowflies, lay their eggs in open wounds or on soiled feathers. These eggs hatch into larvae (maggots), leading to fly strike or myiasis. In chickens, this can cause severe infections, tissue damage, and, if untreated, death.
How to Keep Flies Out of the Chicken Coop

Keep a Clean and Dry Coop
The foundation of a fly-free coop is good airflow and regular cleaning. Flies thrive in dirty and damp environments, so minimizing wet spots is crucial.
- Use a droppings board or dropping board to collect chicken droppings and clean them daily.
- Opt for a deep cleaning of the coop every couple of weeks.
- Spread pine shavings or free wood chips in the coop and chicken run to absorb moisture, promoting a dry coop.
- Ensure proper ventilation and adequate airflow through coop windows and nipple systems to reduce humidity levels.

Eliminate Food Attractants
Flies are attracted to leftover food, so keeping your coop and yard free of food scraps and wet feed is key.
- Leftover food after feeding time.
- Chicken feed that spills, as it can attract a population of flies.
- Consider placing a compost pile or compost bin far from the coop to avoid attracting flies to the chicken yard.

Utilize Natural Fly Repellents and Predators
One of the best things you can do to naturally reduce flies is to incorporate fly predators and beneficial insects. Fly predators are tiny, non-stinging wasps that feed on fly larvae. They’re a great choice to keep the fly problem under control without using chemicals.
- Planting citronella plants and other fresh herbs like mint, lavender, and basil around the coop. These are natural fly repellents.
- Dried herbs such as rosemary, thyme, and oregano in nesting boxes can help repel chicken coop flies.
- Spider webs around the coop are a great way to let nature handle pesky bugs, so when you see them, leave them!

Use Essential Oils and DIY Fly Traps
Essential oils like peppermint, eucalyptus, and tea tree oil are effective natural fly repellents. You can create a spray by mixing coconut oil or water with a few drops of essential oils in a spray bottle. This mixture can be sprayed around the coop area, focusing on dirty areas and coop windows.
Another eco-friendly approach is to make a DIY fly trap. A simple trap can be created with:
- A baited fly trap using apple cider vinegar and dish soap.
- Sticky tapes, like a super fly roll, placed around the coop for catching flying insects.

Manage the Chicken Yard Environment
Free-range chickens help reduce the concentration of flies in one area, but the chicken yard itself needs attention.
- Spread food-grade diatomaceous earth or First Saturday Lime around the yard and coop area to dehydrate fly larvae and adult flies.
- Avoid creating damp areas where flies can breed by keeping waterers clean and dry, especially under nipple systems.
- If you have a compost pile, consider adding black soldier flies, which can outcompete other flies by breaking down organic matter like chicken droppings and fresh manure.

Best Fly Control Products
When flies seem to be relentless, the best fly traps and fly control products can offer relief. Some of the most effective tools include:
- Sticky traps or sticky tape for capturing tons of flies.
- Fly attractant traps, which lure and trap flies in areas around the coop.
- Fly-repellant products, such as natural sprays, can be found at tractor supply stores.
Additionally, encouraging good bugs and natural predators like spiders and frogs is a good choice for long-term fly control.
Bottom Line
Maintaining a healthy environment for your chickens means keeping fly season under control. Through a combination of natural solutions like fly predators, essential oils, and a well-maintained coop with good airflow, you can significantly reduce the population of flies. Focus on keeping things clean, dry, and well-ventilated, and you’ll achieve good results. Whether it’s through adding fresh herbs or setting up the best fly traps, creating a fly-free coop is achievable, and your chickens will thank you for it.
By taking these steps, you’ll not only reduce the fly problem but also foster a healthy environment that supports your flock’s well-being.
What questions do you have? Let me know in the comments!
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What Bugs Do Chickens Eat?
The 17 Best Herbs for Chickens
13 Ways to Protect Your Chickens from Predators
Keep Gnats Out of Your Chicken Coop
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