Please do not get chicken advice from Facebook poultry groups. Most mean well, but others don't know squat but will tell you what to do. The best advice is from a vet or here.I read on some chicken groups and saw a video on line how people used permethrin soaks on their flocks. She is acting weak. I have her under a heat lamp. I was thinking of a warm water soak but I’m afraid it will be too much. I’m go I feel absolutely terrible right now!