A poultry farmer in Enugu noticed her layers dropping egg production gradually over three weeks. She assumed it was a feed issue and switched to a more expensive feed. Production continued dropping. She treated for Newcastle disease. Still no improvement. It was only when she inspected her birds closely at night with a torch that she found the real problem crawling in the feathers around the vent area of nearly every bird in the flock.

Red mites. Present in enormous numbers. Feeding on the blood of her birds every night while she slept.

That farmer lost three weeks of production and spent money on the wrong treatments because she did not know what to look for. This article makes sure you do.

Poultry pests are one of the most underdiagnosed causes of poor flock performance on Nigerian farms. Farmers blame feed quality, disease, or genetics when the actual problem is an infestation of external parasites that is stressing, weakening, and slowly killing their birds from the outside in.

The Main Culprits Affecting Nigerian Poultry

Red Poultry Mite

Dermanyssus gallinae, the red poultry mite, is the most economically damaging external parasite of poultry worldwide and is widespread across Nigerian poultry farms of every size. It is a blood-feeding mite that is invisible to the casual eye, approximately one millimetre long, greyish white when unfed and bright red after a blood meal.

Red mites do not live permanently on the birds. They hide in cracks and crevices in the poultry house structure during the day, in perch joints, wall cracks, under feeders, in nest box corners, and in any dark protected space they can find. They emerge at night to feed on roosting birds, crawling onto the skin and feeding for 30 to 90 minutes before returning to their hiding places before dawn.

This nocturnal behaviour is why daytime inspection of birds often reveals no mites even when the infestation is severe. You must inspect the house structure and birds at night with a torch to confirm red mite presence. Run a white cloth or piece of paper along perch undersides and wall crevices during the day. If red mites are present you will see tiny moving specks, white or red depending on whether they have recently fed, on the white surface.

The impact of a heavy red mite infestation on a Nigerian poultry farm is significant and measurable. Infested layers show reduced egg production, pale combs from anaemia caused by blood loss, restlessness at night, reluctance to enter the house at roosting time, weight loss, and in severe infestations in young birds, death from anaemia.

Northern Fowl Mite

Ornithonyssus sylviarum, the northern fowl mite, differs from the red mite in one critical way. It lives permanently on the bird rather than in the house structure. It spends its entire life cycle in the feathers, feeding, laying eggs, and reproducing without leaving the host.

Infestations are visible as dark crusty accumulations of mites, eggs, and faecal material at the base of feathers around the vent, tail, and breast areas. Heavily infested birds show the same anaemia symptoms as red mite infestations but the mites are visible on the bird during daytime inspection, which makes diagnosis straightforward.

Scaly Leg Mite

Knemidocoptes mutans burrows under the scales of the legs and feet of chickens, causing the characteristic raised, crusty, distorted leg scales that give this condition its name. Infested birds show thickened, encrusted legs with scales lifting away from the surface. The condition causes significant discomfort and lameness in severe cases and spreads slowly between birds through direct contact.

Lice

Poultry lice are flat, fast-moving insects that live permanently in the feathers of infested birds. Several species affect Nigerian poultry including the shaft louse Menopon gallinae and the body louse Menacanthus stramineus. Unlike mites, lice do not feed on blood. They feed on feather material, dead skin cells, and skin secretions. Their primary impact is irritation and feather damage rather than anaemia, but heavy infestations cause significant stress that reduces production and feed conversion efficiency.

Lice are visible during daytime inspection as fast-moving pale yellowish insects running through the feathers when you part them. Lice eggs, called nits, are glued to the base of feather shafts in clusters and appear as small white or yellowish clumps that do not brush off easily.

Fleas and Sticktight Fleas

Echidnophaga gallinacea, the sticktight flea, is a serious poultry pest in Nigerian farms that differs from common fleas in that it embeds its head permanently into the skin of the bird around the eyes, wattles, and comb area rather than moving freely. Clusters of embedded fleas appear as dark specks attached to the skin surface of the head. They cause significant irritation, anaemia in heavy infestations, and secondary bacterial infection at attachment sites.

Confirming What You Are Dealing With Before Spending Money

Misidentifying the pest leads to treating with the wrong product at the wrong time. This confirmation process takes less than ten minutes and saves significant money.

For red mite confirmation inspect the poultry house at night with a torch. Check perch undersides, nest box corners, wall cracks, and feeder supports. Look for moving specks on a white cloth run along these surfaces. Check birds under the wings and around the vent area.

For northern fowl mite and lice inspect birds during the day by parting feathers around the vent, tail, breast, and under-wing areas. Look for moving insects for lice and dark crusty accumulations for northern fowl mite.

For scaly leg mite examine the legs of several birds. Healthy leg scales lie flat and smooth. Raised, thickened, and encrusted scales confirm scaly leg mite infestation.

For sticktight flea examine the head, wattles, and comb area of birds for clusters of dark embedded specks that do not move when touched.

Teating Each Pest Correctly

Treating the House for Red Mite

Because red mite lives in the house structure rather than on the birds, treating the birds alone without treating the house achieves nothing. The mites simply return from their hiding places the following night.

Empty the house completely of birds before treatment. Remove all litter, feeder, and drinker equipment. Mix cypermethrin 10 EC at 10ml per litre of water. Using a compression sprayer, thoroughly spray every surface of the house interior including all wall crevices, perch joints, nest box interiors and exteriors, ceiling surfaces, and the floor. Pay particular attention to any crack or joint in the structure where mites concentrate. Use a fine mist setting to ensure penetration into crevices rather than a coarse spray that runs off surfaces.

Allow the house to dry completely for at least four hours before returning birds. Repeat the treatment after seven days to kill mites that hatched from eggs after the first treatment. Red mite eggs are resistant to most insecticides and hatch within three to five days of the first treatment, making the second application critical for breaking the cycle.

For birds showing heavy infestation treat them simultaneously with a pyrethrin-based poultry dust applied by parting the feathers and dusting into the feather base around the vent, breast, and under-wing areas while the house is being treated.

Treating Birds for Mites and Lice

Permethrin-based poultry dust is the most practical and widely available treatment for on-bird mite and lice control in Nigeria. Apply by holding each bird over a container and dusting the powder into the feathers while parting them to ensure penetration to the skin surface. Pay particular attention to the vent area, under the wings, and around the neck where lice and mites concentrate. Treat every bird in the flock on the same day to prevent reinfestation from untreated birds.

Repeat the dusting treatment after ten to fourteen days to kill mites and lice that hatched from eggs after the first treatment.

Ivermectin injectable solution at 0.2mg per kilogram of body weight administered subcutaneously provides systemic treatment against mites and lice and is available through veterinary suppliers in Lagos, Abuja, and Ibadan. It is more expensive than dust treatment but provides longer residual protection and is particularly effective for northern fowl mite which lives deep in the feather base where surface dust may not penetrate adequately.

Treating Scaly Leg Mite

Smother treatment is the most effective approach for scaly leg mite and costs almost nothing. Dip affected legs in used engine oil, petroleum jelly, or vegetable oil for thirty seconds, ensuring all leg surfaces are thoroughly coated. The oil smothers the mites under the scales by blocking their breathing pores. Repeat every three days for two weeks. As the mites die the raised scales gradually settle back toward normal over four to six weeks as new scale tissue grows.

For severe cases with significantly distorted scales, ivermectin injectable at the same dose used for other mite species provides faster resolution than topical smothering alone.

Treating Sticktight Fleas

Do not attempt to pull embedded sticktight fleas off by force as this leaves the head embedded in the skin and causes secondary infection. Apply petroleum jelly or vegetable oil thickly over the flea clusters and leave for thirty minutes. The oil smothers the embedded fleas and causes them to release their hold. Wipe away with a clean cloth. Treat the surrounding soil and litter in the poultry house with cypermethrin spray at 10ml per litre of water as the soil is the primary flea development environment.

You can also read: Tick and mite control in cattle farming

Keeping Pests Out: Prevention Practices for Nigerian Poultry Farmers

Litter management is the foundation of poultry pest prevention. Moist, compacted litter provides ideal breeding conditions for mites, lice, and fleas. Turn litter every two weeks to break up compaction and expose mite and flea developmental stages to drying and predation. Replace litter completely every three to four months or when moisture content becomes unmanageable regardless of your replacement schedule.

Apply food-grade diatomaceous earth to litter at a rate of one kilogram per ten square metres of floor area monthly. Diatomaceous earth kills mites and lice in the litter through physical abrasion and reduces the environmental reservoir of pests between bird treatments.

Seal cracks and crevices in the poultry house structure during the dry season when red mite populations are building. Red mites require protected hiding spaces close to roosting birds. A well-maintained house with sealed joints, smooth perch surfaces, and no deep crevices in walls supports significantly lower red mite populations than a deteriorating structure with multiple hiding sites.

Quarantine new birds for at least two weeks before introducing them to your existing flock. New birds are the most common route by which new pest species and heavy infestations enter a previously clean flock. House new arrivals in a separate structure, inspect them thoroughly for all external parasites, treat them preventively, and only integrate them after confirming they are pest-free.

Conduct monthly whole-flock inspections even when no symptoms are visible. Early detection of a small infestation costs a fraction of the treatment required for a heavy established one and prevents the production losses that occur during the weeks a heavy infestation builds before symptoms become obvious.

The Production Losses Farmers Attribute to the Wrong Causes

Reduced egg production blamed on feed quality when the real cause is anaemia from red mite blood feeding. Pale watery yolks attributed to nutritional deficiency when they are actually the result of chronic blood loss stress on the bird. Increased feed consumption with no weight gain or production improvement explained away as poor feed conversion when the birds are consuming extra feed to compensate for the energy drain of fighting off a heavy lice or mite infestation.

These misattributions cost Nigerian poultry farmers significant money every season in unnecessary feed upgrades, disease treatments, and nutritional supplements that address symptoms without touching the actual problem.

The rule of thumb is simple. Before changing feed, before treating for disease, before blaming genetics, inspect your birds and your house for external parasites. It takes ten minutes. It costs nothing. And it will save you from spending money solving the wrong problem.

Conclusion

Poultry pests are silent profit killers on Nigerian farms. They do not kill birds dramatically the way Newcastle disease does. They work gradually, reducing production, increasing feed costs, stressing the flock, and draining your income slowly enough that many farmers never connect the pest to the problem.

After reading this article go into your poultry house tonight with a torch and check the perch undersides and wall crevices for red mite. During the day tomorrow part the feathers of ten birds and check the vent and under-wing areas for lice and northern fowl mite. Examine the legs of your oldest birds for scaly leg mite symptoms.

If you find any of the pests described in this article, begin treatment this week using the methods above. Treat the house and the birds simultaneously. Repeat after ten to fourteen days without fail. And build a monthly inspection routine into your farm calendar so that next time you catch it before it costs you three weeks of production the way that farmer in Enugu did.