Sick chickens are very susceptible to lice. Once they have them they need treatment. Permethrin dust can be used but be careful as it is very toxic to people. We like to treat with ivermectin injections. Please do not use horse or cow ivermectin paste or drench on chickens, they are much too concentrated for our mini feathered friends and you could kill your chicken if you overdose them! #chicken #poultry #lice #petchickens #vetmed #exoticvet | Dr. Melissa Magnuson, The Conscious Vet