This site is full of misinformation, heck, I've posted some myself. Let's both do an experiment together... let's go find a bird with feather lice, take pictures, administer ivermectin and follow up with pictures the next day, that would be fun, right? I'm sure one of my Faverolles or Cochins has some lice again.There are several posts on this site where many folks have discussed the use of different types of Ivermectin. Including ridding chickens of lice and worms.
You do not have the right to tell me to knock off the "misinformation".
Ivomec Eprinex worked on my hens. Let the OP decide how to use any or all of the advice given.
As for ivermectin treating worms, there's a properly documented study that says it's an ineffective wormer in poultry.
Source: http://www.ncbi.nlm.nih.gov/pubmed/2816174
Ivermectin as a bird anthelmintic--trials with naturally infected domestic fowl.
Oksanen A, Nikander S.
Abstract
To evaluate the use of ivermectin as a bird anthelmintic, 29 White Leghorn hens naturally infected with Ascaridia spp., Heterakis spp. and Capillaria spp. were treated with 0.2, 2 or 6 mg/kg intramuscularly or 0.2 or 0.8 mg/kg orally. Faecal samples were collected before treatment and at autopsy, 2, 6, or 16 days after treatment, when the intestines were also examined for helminths. None of the treatments gave satisfactory anthelmintic results
-Kathy