An effective and long lasting repellent for controlling lice on horses, farm livestock and companion animals. Effective against red mite on poultry. Size: 500gm Louse Powder. What animals can it be used on Cows, horses, donkeys, minis, alpacas, goats, sheep, pigs, poultry. Active ingredient P-Menthane - 3,8-diol 0.8%w/w Application Apply an even spread of powder over the affected area on the animal or the bedding. With-holding period No withholding period for meat or eggs. How does it work It is a repellent that deters rather than kills the insect. (Not an insecticide) Insects it is effective on Louse (Lice), Red & White mites. How long does it last Will stay on the animal for up to 7 days if kept dry. Usage amount 5g to 10g covers an area 10cm X 15cm