UPDATE: Both hens are like different girls! Doing really well just from treatment with the Johnsons Mite & Lice powder. I completely treated their wooden hen house with pest control spray and put a little DE in their sand bath. Still two more sessions to go with the powder, but all looks good so...
I have two silver laced orpingtons - Margaret and Mrs Warboys - and the poor girls have a HORRID infestation of lice around their vents and backside area. They're only about ten months old (and still haven't started laying!) but I've had these constant infestations since I got them home. My...