Chicken mites: how to find them and get rid of them

Treat the birds and the coop at the same time, and treat again four to seven days later. That second treatment is the whole answer: Extension's external parasite guidance states plainly that "it is necessary, therefore, to re-treat an infected flock every four to seven days," because eggs that survive the first round hatch into the gap. One treatment feels like it worked and is why the problem returns in a fortnight.

Mites are the most consequential husbandry problem on this site that you cannot see from across the yard. A heavy infestation causes anaemia from blood loss, usually with a fall in laying or growth rate and lower feed intake. Birds get it from wild birds, from other poultry, and from a coop that never got cleaned properly.

Mites or lice? They hide in different places

This matters because it changes where you look and what you treat.

The practical consequence: if you inspect birds in daylight and find nothing but you are confident something is biting them, you are probably dealing with the chicken mite, which hides in the structure during the day and feeds at night. Extension is explicit that during daylight hours these mites live in dark areas of the poultry house — cracks and crevices in roosts, walls, ceilings and floors — and come out at night to feed.

How to check, properly

1. Pick a bird up after dark, with a torch. Night is when mites are on the bird.
2. Part the feathers around the vent, which is where Extension says to look for northern fowl mites. You are looking for tiny specks that move.
3. Look at the base of the feather shafts for clusters of eggs, which indicates lice rather than mites.
4. Run a pale cloth along the underside of the roost bar. Red smears mean mites have been crushed, and that is a house problem, not a bird problem.
5. Check the darkest crevices in the roost ends, the joints and under the nest-box lip. Those are the harborage sites.

The treatment

Extension's approach has two halves and both are required. On the birds, effective treatment may involve treating all birds with an insecticide approved for poultry, following every label instruction including protective equipment and withholding times. Use a product labeled for poultry and follow its label — that is the part of this page where you should be reading the bottle rather than a website, because withholding periods for eggs differ between products and are a food-safety matter.

On the coop, Extension is specific: it is important to treat the inside of the poultry house, making sure the nesting area, roosts, and any cracks and crevices are treated. In practice that is where people under-do it. The roost bar ends, the joints, the underside of the nest-box lip and the seams of a wooden coop are the places mites survive a casual spray.

Dust bathing and diatomaceous earth

Extension names one non-chemical measure directly: including food-grade diatomaceous earth in dust baths is a nontoxic insecticide option, and providing birds with an area to dust bathe helps control external parasites. That is worth taking seriously — a dry, loose dust-bathing patch in the shade is both free and genuinely preventive.

Two honest caveats. Diatomaceous earth only works dry, so a dust bath exposed to rain does nothing. And it is a dust: it is as irritating to bird and human lungs as any fine powder, so keep it in a bathing area rather than scattering it through the coop air.

What to use on the coop

A coop-safe insect deterrent, the lowest-dust bedding we rank, the deep-clean cleaner, and the zeolite that handles the ammonia side.

#1 · Mites and lice in the coop, not odor

$41.99·on Amazon

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First Saturday Lime Insect Deterrent, 20 lb

First Saturday Lime

7.5/10★★★★☆Assessed on specs and owner reports

A coop-safe lime-based insect deterrent. It is not hydrated lime and it is not an odor absorber — it is for the mite and lice problem, which is a different job from the ammonia one.

Published specifications

Weight	20 lb
Function	Insect deterrent
Use	Outdoor and coop areas
Active ingredient detail	Not published by manufacturer

Specifications per Manufacturer figures as published on the Amazon product listing, as published at the date above.

What it does well

• Targets the mite and lice problem that bedding changes alone do not solve
• Safe around birds, unlike caustic hydrated lime, which should never go in a coop
• A 20 lb bag treats a backyard coop many times over

Where it falls short

• Does nothing for ammonia — pair it with zeolite rather than substituting it
• Full ingredient breakdown is not published on the listing
• Like any powder, it is dusty to apply

Our rubric

Fit for purpose

8.0

Mess and waste

6.0

Quality

8.0

Value

8.0

#2 · Low dust in a small or poorly ventilated coop

$74.95·on Amazon

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RentACoop Premium Hemp Bedding, 300L

RentACoop

8.0/10★★★★☆Assessed on specs and owner reports

300 liters of hemp hurd per 30 lb bale. Hemp costs more than pine up front but absorbs more per liter and throws far less dust — which is the thing that actually damages chicken lungs.

Published specifications

Material	Hemp hurd
Volume	300 L
Weight	30 lb
Intended use	Chickens, rabbits, horses

Specifications per Manufacturer figures as published on the Amazon product listing, as published at the date above.

What it does well

• Volume and weight both published, so the real cost per liter is comparable
• Markedly less dust than pine — the single biggest respiratory factor in a closed coop
• Absorbs more liquid per liter than shavings, so the litter stays drier between changes
• Composts readily

Where it falls short

• Costs several times what an equivalent volume of pine does
• Finer particles can sift through widely-spaced slatted floors
• Not stocked in most feed stores, so you are ordering it

Our rubric

Fit for purpose

9.0

Mess and waste

8.0

Quality

9.0

Value

6.0

#3 · The annual deep clean

$29.52·on Amazon

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MICROBE-LIFT Chicken Coop Cleaner and Odor Eliminator

MICROBE-LIFT

7.5/10★★★★☆Assessed on specs and owner reports

A biological surface cleaner for the twice-a-year scrub-out, usable on coop surfaces and equipment. It is for cleaning, not for daily odor control — those are different products.

Published specifications

Type	Biological cleaner and odor eliminator
Surfaces	All coop surfaces and equipment
Volume	Not published by manufacturer
Dilution	Not published by manufacturer

Specifications per Manufacturer figures as published on the Amazon product listing, as published at the date above.

What it does well

• Designed for coop surfaces, so it is safe on the feeders and waterers too
• Biological action breaks residue down rather than just wetting it
• Turns the deep clean from a bleach job into a rinse job

Where it falls short

• Volume and dilution are not published, so cost per clean is unclear
• A cleaner, not a daily deodorizer — you still want zeolite on the poop board
• Surfaces need to dry fully before the birds go back in

Our rubric

Fit for purpose

8.0

Mess and waste

7.0

Quality

8.0

Value

7.0

#4 · Ammonia under the roosts

$24.95·on Amazon

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Sweet PDZ Coop Refresher, 10 lb

Sweet PDZ

8.8/10★★★★◐Assessed on specs and owner reports

Granular zeolite that binds ammonia rather than masking it. Dusted on the poop board under the roosts it is the most effective single thing you can do about coop smell.

Published specifications

Active material	Zeolite
Weight	10 lb
Function	Ammonia and odor absorption
Scent added	None

Specifications per Manufacturer figures as published on the Amazon product listing, as published at the date above.

What it does well

• Chemically binds ammonia instead of covering it with fragrance
• No added scent, which matters because fragrance oils irritate bird airways
• A thin layer on the poop board is all it takes — a 10 lb bag lasts a small flock months
• Safe to compost with the litter

Where it falls short

• It is a granular mineral: it will not fix a coop that is genuinely under-ventilated
• Needs topping up as it saturates
• Dusty to apply — worth doing with the hens outside

Our rubric

Fit for purpose

10.0

Mess and waste

7.0

Quality

9.0

Value

9.0

Why plastic coops do not get red mite

Because there is nowhere for it to live. The chicken mite's whole strategy depends on daytime harborage in cracks, grain and joints, and a non-porous twin-wall plastic shell has none. This is the strongest practical argument in the plastic versus wood decision, and it is the one that keepers who have fought red mite in a wooden coop mention first. It is also why the Omlet Eglu has the reputation it does.

If you have a wooden coop, that is not a reason to replace it. It is a reason to treat the structure rather than only the birds, to keep the seams accessible, and to do a full clear-out twice a year rather than once.

Preventing the next one

• A dry, shaded dust-bathing area, always available, with food-grade diatomaceous earth in it.
• Low-dust, absorbent bedding, changed before it mats. Hemp and kiln-dried pine both qualify; coop bedding compares them.
• Two full clear-outs a year, with the roosts and crevices scrubbed rather than just the floor swept. How to clean a chicken coop is the method.
• Quarantine new birds before they join the flock. Most infestations arrive on a bird.
• Keep wild birds off the feed. They are a route in, which is one more argument for a rat- and bird-proof feeder.

One thing to be clear about: lime-based coop deterrents and zeolite odor absorbers are not insecticides and should not be treated as a cure. They make a coop less hospitable and they handle the ammonia problem that often runs alongside a neglected coop. The infestation itself is dealt with by a poultry-labeled product, applied to birds and house, twice, four to seven days apart.