The permethrin spray when used on the coop walls, roosts and nest boxes for lice, can help to keep flies out of the coop for about 30 days. Permethrin 10 concentrate in pint or quart containers (Martin or Gordons brands) is sold by TSC and online. It is mixed with water 1 tsp per quart or 4 tsp...
Sorry that you lost her. Did you figure out what the scabs came from? It sounds like she had a horrible time with the lice, the maggots, and then the others who were eating her scabs. I would have separated her from the others.
I would check them again, because lice are hard to get rid of, and...
@Laylashens is she doing any better? If you are still doing the daily warm soaks, I would use a washcloth to rub off a little of the softened scabs. It will take a lot of work to get her cleaned up. Honestly, I would consider putting her down, since she may be suffering.
To prevent the others...
Is the scab in the midline over her breast bone, or is it to the left or lower that the breast bone? They can get breast blisters over the breast bone if they have a rough roost, or if they spend a lot of time lying on a damp floor or having problems walking. They also can develop abscesses or...