I am dealing with a lice infestation right now too, and my older hen had them really bad, so I used a permethrin solution that I mixed myself to spray on her...then I cleaned out their coop and bedding, sprayed the coop with the solution, re-bedded it and dusted the bedding with a DE/permethrin dust compound that was recommended by my local feed store.
I will be re-treating the birds again in about 10 days, either with another spray down or just by dusting them.
I will be re-treating the birds again in about 10 days, either with another spray down or just by dusting them.