Mites and lice: confirming them, then treating by the label

A note on scope before anything else. This page covers external parasites, which are a visible, confirmable, treatable problem a keeper can handle. It is not veterinary advice, and anything systemic — a bird that is unwell rather than itchy — is a call to a veterinarian or your state poultry extension office.

Confirm before you treat

Half the mite treatments bought are bought on suspicion. Do not treat a flock for something you have not seen, both because the treatment is unnecessary stress and because the actual problem then goes unaddressed.

How to look. Pick a bird up, hold her securely, and part the feathers around the vent and under the wings. You are looking for small moving specks, clusters of eggs at the base of feather shafts, or gray-white crusting. A white cloth or paper under a roost bar overnight will also collect red mites, which leave the birds during the day and live in cracks in the woodwork.

Other signs. Birds that refuse to go into the coop at night, a drop in laying, pale combs, restless preening, or a bird losing condition are all consistent with a heavy burden. None of them is proof on its own.

Mites and lice are not the same problem

The distinction matters because red mites live in the structure rather than on the birds. Treating the birds alone does nothing about a red mite population sitting in the roost bar during the day, and this is the usual reason an infestation comes back a week after treatment.

Treating, by the label

The published option we can point at is Elector PSP, whose active ingredient is spinosad at 44.2 percent, a fermentation product of a soil bacterium rather than a synthetic pyrethroid.

• Egg withdrawal: nil, in the US and EU. That is the property that makes it usable at all on a laying flock — most alternatives require discarding eggs.
• Published directions for northern fowl mites: 3 oz per 10 gallons of water, sprayed directly on the birds with attention to the vent area.
• Re-application: every 14 days as needed. The repeat is not optional in practice — the treatment does not kill eggs, so a second pass after they hatch is what actually ends the infestation.
• It treats premises too, so the coop and the birds can be dealt with in one session.

Whatever you use, use it exactly as the label says. Dilution, interval and target are all on there, and this site’s position is that we repeat the label rather than improve on it.

Treat the coop at the same time

This is the step that gets skipped and it is why infestations return.

1. Strip all bedding and dispose of it away from the coop.
2. Scrape roost bars and the ends where they meet the wall — the joint is where red mites live.
3. Treat the structure with a product labeled for premises, per its own directions.
4. Re-bed with clean material.
5. Repeat at the label interval, alongside the second treatment of the birds.

Smooth, sealed roost bars with no cracks are considerably easier to keep clear than rough sawn timber, which is worth knowing before you build.

Prevention

A dust bath is the flock’s own parasite management and providing one is the cheapest prevention available. Beyond that: keep bedding dry, avoid straw with hollow stems where mites shelter, quarantine any new bird for a couple of weeks before it joins the flock, and check the vent area of a couple of birds every month or so. Finding a light burden early is much easier than treating a heavy one.