Poultry Mites & Lice: Identification, Signs & Effective Treatment
- Oct 22, 2025
- 8 min read
Updated: 7 days ago
Finding mites or lice on your chickens can be alarming, but it doesn't mean you're keeping a dirty coop.
External parasites are a natural part of raising backyard poultry. Wild birds, rodents, other animals, and even visitors who own chickens can unknowingly introduce mites and lice into your flock.
The good news is that infestations can be successfully treated. The first step is learning to recognize the signs and understanding which parasite you're dealing with, because not all mites behave the same way.
Common Signs of a Mite or Lice Infestation
Whether your chickens have mites or poultry lice, many of the symptoms are similar.
Watch for:
Dirty or stained feathers around the vent
White clusters of eggs (nits) attached to feather shafts
Tiny insects crawling through the feathers
Excessive scratching or preening
Red or irritated skin
Scabs around the vent
Pale combs and wattles
Weight loss
Reduced egg production
Lethargy
One of the easiest places to begin your inspection is around the vent. Dirty vent feathers often warrant a closer look for external parasites.
Mites vs. Poultry Lice
Although they're often grouped together, mites and poultry lice are very different parasites.
Poultry Mites
Poultry mites feed on a chicken's blood. Heavy infestations can cause anemia, weakness, decreased egg production, weight loss, and, in severe cases, death.
Some species will also bite humans, causing temporary itchy skin irritation.
Poultry Lice
Poultry lice do not feed on blood.
Instead, they feed on dead skin, feather debris, and feather sheaths. They spend their entire life on the chicken and cannot survive long away from their host.
Unlike human head lice, poultry lice are species-specific.
You cannot catch lice from your chickens, and your chickens cannot catch lice from people.
Northern Fowl Mites vs. Red Roost Mites
This is one of the most important distinctions every chicken keeper should understand.
Although both parasites are blood-feeding mites, where they live determines how they must be treated.
Feature | Northern Fowl Mites | Red Roost Mites |
Where they live | Primarily on the chicken | Mostly in the coop |
When they feed | Day and night | At night only |
Where to find them | Around the vent and under feathers | Roosts, nesting boxes, cracks and crevices |
Inspection | Easily found on the bird | Often easier to find in the coop after dark |
Treatment | Focus on treating the birds | Treat both the birds and the entire coop |
Red Roost Mites
Red Roost Mites behave very differently.
Rather than living on the chicken, they spend the day hiding inside cracks, roosts, nesting boxes, joints, and crevices throughout the coop.
After dark, they crawl onto sleeping chickens, feed on blood, then return to their hiding places before daylight.
Because most of the mites are hiding in the coop instead of on the birds, infestations are often missed until they become severe.
Signs of Red Roost Mites
Chickens reluctant to roost
Restlessness at night
Pale combs
Poor egg production
Anemia
Tiny grey or red mites on roosts after dark
Blood smears or mite clusters in cracks
Inspection Tip
If you suspect Red Roost Mites, inspect your coop after dark with a flashlight. Check underneath roosts, inside nesting boxes, and in every crack and crevice. This is when the mites are actively feeding and easiest to find.
Northern Fowl Mites
Northern Fowl Mites spend nearly their entire life cycle on the chicken.
They're most commonly found around the vent where they feed on blood, lay eggs on feather shafts, and leave behind dark debris that can make feathers appear dirty.
Because these mites remain on the birds, treatment is generally more straightforward. Every chicken in the flock should be treated, but extensive spraying of the coop is usually unnecessary.
Signs of Northern Fowl Mites
Dirty vent feathers
Black pepper-like debris around the vent
White eggs attached to feather shafts
Pale comb
Reduced egg production
Weight loss
Scabby skin
Poultry Lice
Unlike mites, poultry lice do not feed on blood. Instead, they feed on dead skin, feather debris, and the sheaths of developing feathers. While they don't cause anemia like blood-feeding mites, heavy infestations can still make chickens uncomfortable and lead to poor feather condition, irritation, stress, reduced egg production, and weight loss.
Poultry lice are small, flat, six-legged insects that are usually straw-colored or light brown. They spend their entire life on the chicken and cannot survive for long without a host.
The female louse glues her eggs, commonly called nits, to the base of the feather shafts, most often around the vent. These white egg clusters are often easier to spot than the lice themselves. Adult lice move quickly through the feathers and may scurry out of sight when the feathers are parted during an inspection.
Signs of Poultry Lice
Look for:
Fast-moving, straw-coloured insects on the skin and feathers
White clusters of nits attached to feather shafts
Dirty or ragged-looking feathers
Excessive preening or scratching
Feather damage or feather loss
Restlessness
Reduced egg production in heavy infestations
How Are Poultry Lice Treated?
Because poultry lice spend their entire life cycle on the bird, treatment focuses primarily on treating every chicken in the flock. Although cleaning the coop is always recommended as part of good flock management, poultry lice do not hide in cracks and crevices like Red Roost Mites.
Most treatments require repeat applications approximately 7 days apart because they kill the adult lice but not the eggs (nits). Once the eggs hatch, another treatment is needed to eliminate the newly emerged lice before they can reproduce.
Elector® PSP is an exception. When used according to the label, it controls both poultry lice and their developing stages with a single application, making it an excellent option for treating an entire flock.
Don't Forget Scaly Leg Mites
Scaly Leg Mites are another common external parasite.
Scaly Leg Mites (Knemidocoptes mutans) are a different type of external parasite than Northern Fowl Mites and Red Roost Mites. Instead of living in the feathers, these microscopic mites burrow beneath the scales on a chicken's legs and feet, where they tunnel through the skin.
As the mites burrow, they cause irritation and inflammation, prompting the leg scales to lift away from the skin. Over time, debris can accumulate beneath the raised scales, giving the legs a rough, thickened, or crusty appearance.
Signs include:
Raised scales
Thickened legs
Crusty deposits
Lameness in severe cases
If left untreated, the condition can worsen, making it painful for the chicken to walk and increasing the risk of secondary bacterial infections.
Treating Scaly Leg Mites
The goal of treatment is to eliminate the mites while helping the damaged skin heal as healthy scales gradually grow back.
At Roslin Poultry Ranch, I recommend Chick' N Balm, a soothing topical balm formulated with Sulphur, an ingredient long recognized for its ability to eliminate scaly leg mites. In addition to helping control the mites, Chick' N Balm moisturizes dry, damaged skin and can also be used to support the healing of minor cuts, scrapes, and wounds.
For best results, apply the balm thoroughly to the affected legs, working it gently under the raised scales where the mites are burrowing. Repeat applications as needed until healthy new scales begin to replace the damaged ones.
How Do Chickens Get Mites or Lice?
External parasites commonly arrive through:
Wild birds
Rodents
Newly introduced chickens
Shared poultry equipment
Visitors who keep poultry
Wildlife entering the coop
Finding mites or lice does not mean your coop is dirty. Even well-managed flocks can become infested.
Prevention
Good management helps reduce the risk of severe infestations.
Inspect your flock regularly.
Quarantine new birds.
Clean your coop routinely.
Remove loose feathers during cleaning.
Store feed securely to discourage rodents.
Discourage wild birds from visiting the coop.
Provide clean, dry sand for dust bathing.
Dust bathing helps chickens maintain healthy feathers but will not eliminate an established mite or lice infestation.
As part of our own flock management routine, we also use Chick' N Protect, an all-natural essential oil spray made with carefully selected plant-based ingredients. It's designed to help discourage common outdoor pests such as mosquitoes, flies, ticks and mites along with other nuisance insects while chickens are spending time outdoors.
While no preventative product can guarantee your flock won't encounter mites or lice, combining regular flock inspections with good biosecurity and preventative management practices gives you the best chance of catching problems early.
Treatment Options for Poultry Mites and Lice
Once mites or lice are identified, prompt treatment is important. Remember, if one bird is infested, the entire flock has likely been exposed.
Many parasite treatments kill only the adult mites or lice and do not kill the eggs (nits). For this reason, most products require repeat treatments approximately 7 days apart to kill newly hatched parasites before they mature and reproduce.
The following products are commonly used by poultry keepers:
Elector® PSP (Spinosad)
Advantages
Controls both mites and poultry lice.
Effective against both adult parasites and immature stages when used according to the label.
One application is generally sufficient when applied correctly.
No egg withdrawal period.
Can be sprayed directly on chickens and throughout the coop.
Parasite resistance is uncommon due to its unique mode of action.
Best suited for:
Northern Fowl Mites
Red Roost Mites
Poultry Lice
Permethrin-Based Poultry Dusts and Sprays
Products containing permethrin are commonly used to control external parasites in poultry.
Examples include:
Garden & Poultry Dust ( I do not recommend Diatomaceous Earth)
Various poultry sprays containing permethrin
Advantages
Effective against mites and lice when used correctly.
Useful for treating birds and the coop.
Limitations
Usually requires two or three treatments, spaced about 7 days apart.
Does not reliably kill eggs (nits).
Over time, mites and lice may develop resistance in some areas.
Pyrethrin Sprays
Some poultry sprays contain pyrethrins, which are derived from chrysanthemum flowers.
Pyrethrin-based poultry sprays are another treatment option available in Canada. These products kill mites and lice on contact but generally require repeat treatments approximately 7 days apart because they do not kill the eggs (nits). Availability may vary by province and retailer.
Flea Shampoos or Flea Dips (Emergency Use)
Some chicken keepers have used dog flea shampoos or flea dips to temporarily reduce mite numbers on individual birds.
These products are not specifically labeled for poultry and should not be considered a primary treatment for a flock. They also do not eliminate parasites hiding in the coop.
What About Diatomaceous Earth?
Food-grade diatomaceous earth (DE) is often promoted as a natural solution for mites and lice.
However, current evidence does not support its effectiveness for controlling established infestations. In addition, inhaling the fine dust may irritate the respiratory tract of both chickens and people.
For these reasons, I do not recommend relying on DE as a treatment or adding it to dust bathing areas.
My Preferred Choice
Over the years, I've found Elector® PSP to be my preferred treatment because it is simple to use, highly effective, and can be applied directly to both the chickens and the coop.
Unlike many traditional treatments that require multiple applications to catch newly hatched parasites, Elector PSP works differently and, when used according to the label, generally requires only a single application. It also has no egg withdrawal period, making it an excellent choice for laying hens.
Final Thoughts
External parasites are one of the most common health challenges backyard chicken keepers will face, but they don't have to become a crisis.
Routine flock inspections, early detection, and understanding the difference between Northern Fowl Mites and Red Roost Mites will help you choose the right treatment from the start.
Remember, mites and lice are a fact of outdoor poultry keeping. Finding them doesn't mean you've failed—it simply means it's time to take action before a small problem becomes a serious one.
Products Mentioned in This Article
If you've identified external parasites in your flock or are looking to add preventative products to your poultry health toolkit, these are the products discussed throughout this article.
An all-natural essential oil spray designed to help discourage common outdoor pests, including mosquitoes, flies, ticks, and other nuisance insects. It can be incorporated into your flock's overall parasite prevention routine alongside good biosecurity and regular flock inspections.
My preferred treatment for Northern Fowl Mites, Red Roost Mites, and Poultry Lice. Elector PSP contains Spinosad, has no egg withdrawal period, and can be applied to both chickens and the coop when used according to the label.
A Sulphur-based topical balm formulated to help eliminate Scaly Leg Mites while soothing dry, irritated skin. It's also useful for supporting the healing of minor cuts, scrapes, and wounds.
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