lice and mites!! please help

[mrc1983]

ive tried all the powders and shampoos and none seem to work ive heard of
HARKAMECTIN 0.35% IVERMECTIN just wondering if anyone has used it on there hens, if so how much do you give them and how often? also is there an egg withdrawl period? any advice would be gratefull. chears

 

[ChickenCanoe]

Not familiar with that but have you tried 5% Sevin dust? That's what I always recommend.