I can across this hilarious video the other day. This guy is a stitch! [As a side note, when I’ve dusted my birds, I’ve held them upside down by the legs with one hand, away from my body, put the powder in the butt feathers (fluff), worked the powder down through the bird’s body, and then put powder under the wings as well.]
If your birds have lice, you may want to use a dusting powder (he mentions pyrethrin/permethrin). Pyrethrins are insecticidal compounds that occur naturally in certain flowers. They can also be synthetically produced (called permethrin). They are low-toxicity pesticides and are biodegradable. For chickens, the compound is formulated as a powder, which can be placed in the fluff and under the wings. The powder will kill adult lice and mites. It will not kill the eggs on the feather shafts and so must be reapplied seven days after initial treatment. Apply 2-3 times after initial treatment, seven days apart.
Signs of lice infestation include red, irritated skin (esp. on the back end); dirty vent feathers; lack of energy; bald spots; ragged feathers; and (most obvious) spotting lice or eggs on the bird. The adult lice are about 1/16 of an inch long, pink, and quick moving. (You may find them walking on you after you handle your birds, but humans CANNOT get poultry lice.) Lice deposit their eggs in the fluffy feathers near the bottom of the shaft. Louse eggs look like clumps of gray, matted material starting at the base of the feather shafts, close to the body.
Northern fowl mites/Red mites look like tiny red, pin-prick dots on the birds. If the bird has mites, you may see scabs around the vent area. Mites generally like to live in the cracks of wooden coops. They will come out at night to feed on the birds. If the coop has a mite infestation, the birds may not want to go into the coop at night.
You can prevent lice/mite infestations by limiting the birds’ contact with wild birds and providing places for them to dustbathe. Some believe that putting some diatomaceous earth (DE) in their favorite dusting spots; however, I’ve spoken to avian veterinarians who have cautioned against the use of DE because they believe that inhalation of DE can harm the birds’ respiratory system.
It is best to treat the flock as soon as you notice lice/mites on the birds, to prevent a heavy infestation.