I think I've found a perfect solution. I didn't know about these pests until I found a massive colony on the head of one of my hens. I read all the comments on several sites about treatment. I didn't want to use toxic chemicals. One of the suggestions was olive oil twice a day. I figured that would smother them. However, I don't have time to put olive oil on my hens twice a day - and it didn't say how long it would take. I also figured olive oil would run or get rubbed off quickly. Light bulb goes on time~! I had a jar of LANOLIN SKIN PROTECTANT. That stuff is sticky as heck. I went down last night and applied it to one hen - the one with the worst infestation -- for an experiment, in case there were problems, I didn't want all of them to get problems. I rubbed it into each spot well and smoothed her feathers. She shook her head and scratched a bit, but a little corn scratch distracted her from that. It was close to roosting time, so she went to bed. Just checked her around noon this morning. She had dusted herself and the goo was covered in dust - BUT - here's the good part - A GOOD 2/3 OF THE STICK TIGHTS WERE GONE~! I was flabbergasted and excited. She didn't seem any the worse for the wear and was about her regular day. I would recommend 50% to 100% Lanolin in a jar - it's very thick and stays on well. Check the other ingredients if it's not 100% so you don't get anything toxic. I was also careful not to get it in her eyes, nostrils or ears.