TropicalChickies
Crowing
No, the idea with hanging up the sachet bags of sulphur powder is to put them where chickens will bump them while getting on to the roosts and get a "poof" of dust on them. And as @RoyalChick points out, if the sachet is hanging there in the coop, it's handy to give the chickens a little powder puffing while they are on the roosts.Have you got lice in the coop?
Lice usually stay on the chicken.
https://thisnzlife.co.nz/5-things-to-know-about-lice-in-poultry/