Depluming Mite

The depluming mite (knemidocoptes gallinae) can infect most backyard fowl including chickens, ducks and geese. The mite burrows into the feather shafts and the skin surrounding the feathers. This burrowing causes damage to the skin and feathers, causing fluid to ooze out; it is this fluid on which the mites feed. As the mites burrow into the feathers, the pain can be enough to cause the bird to pull out its own feathers hence the name ‘Depluming Mite’.

The mite spends its entire life on the bird and as such cannot survive in the environment without birds.

The mite is transmitted between birds by direct contact.

The mite can reach adulthood in as little as 17 days and prefer to reproduce in the spring / summer months. Many birds often carry low numbers of mites without symptoms, but when they are stressed mite numbers grow rapidly.

Interestingly this mite gives birth to live young rather than laying eggs.


  • Feather loss.
  • Broken or damaged feathers.
  • Scratching.
  • Increased preening.
  • Restlessness.
  • Moulting out of season.


  • A parasitic mite, knemidocoptes gallinae causes deplummming itch.


Note that this home remedy is not intended to offer a cure or replace veterinary treatment, but may alleviate symptoms where no professional support is easily available. The suggestions are based on experience gained with our own hens.


There is no way to prevent this condition.

Depluming Mite
Figure 1: Damage caused by Depluming Mite