POULTRY · OWNER EDUCATION
Mites and Lice in Poultry
External parasites can cause irritation, feather damage, reduced production and—when severe—dangerous blood loss.
THE SHORT VERSION
Understanding supports better veterinary conversations.
External parasites can cause irritation, feather damage, reduced production and—when severe—dangerous blood loss. The same outward signs can occur with several diseases, so an examination and appropriately selected testing are important.
What is this condition?
External parasites can cause irritation, feather damage, reduced production and—when severe—dangerous blood loss. The same outward signs can occur with several diseases, so an examination and appropriately selected testing are important.
Which animals can be affected?
Risk factors, examination findings and management can differ between species and individual patients.
Why can it happen?
- Contact with affected birds, wildlife, equipment or contaminated housing.
- Some mites hide in coop cracks and feed on birds at night.
What might an owner notice?
- Scratching, feather damage, crusting or visible insects or eggs.
- Pale combs, weakness, reduced laying or sudden reluctance to enter the coop.
How is the problem investigated?
- Inspection of birds, feathers, skin and nighttime housing areas.
- Microscopic identification when the parasite is uncertain.
What might treatment involve?
- Poultry-labeled treatment selected for the parasite and production status.
- Coop cleaning and repeat treatment timed to the parasite life cycle.
This is an overview, not a prescription or a recommendation for a specific individual animal.
What can owners do at home?
- Write down when the problem began and track appetite, drinking, waste, activity, breathing and medication use.
- Bring clear photos or short videos when they can be taken without stressing the animal.
- Follow the veterinary team's instructions for medication, feeding, isolation, environmental changes and rechecks.
Avoid actions that could make care less safe.
- Do not use human medication, leftover antibiotics or another animal's treatment without veterinary direction.
- Do not force food or water into an animal that cannot swallow normally, is struggling to breathe or may have an obstruction.
- Do not delay veterinary care when pain, breathing, appetite, urination, movement or responsiveness changes quickly.
What can the longer-term outlook involve?
The outlook depends on the underlying cause, severity, species and how quickly effective care begins.
Can risk be reduced?
- Provide species-appropriate nutrition, housing, sanitation and routine veterinary care.
- Learn the animal's normal behavior, appetite, body condition and waste pattern so meaningful changes are noticed early.
When should you arrange care?
- Contact a veterinarian promptly for scratching, feather damage, crusting or visible insects or eggs. or pale combs, weakness, reduced laying or sudden reluctance to enter the coop..
- Arrange reassessment if signs return, worsen or do not improve as expected.
Seek emergency veterinary care if you notice:
SEEK EMERGENCY VETERINARY CARE- Marked weakness, very pale comb, collapse or heavy infestation in young birds.
Sources behind this guide
VeterinaryPartner — client education from the Veterinary Information NetworkPrimary veterinary or veterinary-university guidance ↗Merck Veterinary Manual: poultryPrimary veterinary or veterinary-university guidance ↗Content last reviewed: September 17, 2026. Review status: veterinary-informed; independent veterinarian review not yet completed.