Dermoline Insecticidal Shampoo is a powerful treatment for lice infestation and repelling and killing flies. Ideal for routine coat care and when the rick of lice infestation is increased. This is a licensed medicinal product for use on horses. Dosage and administration:Thoroughly saturate the Horses cot with one part shampoo and ten parts warm water, then pour the shampoo as required over the back of the animal. Rub this to create a lather and add more water as necessary. Rinse thoroughly and dry. Take care to prevent the shampoo coming into contact with eyes. Dosage and administration for lice infestation:Use at least 1 litre of shampoo/horse and ensure that all parts of the body are shampooed thoroughly. Dont rinse off for at least 10 minutes. Repeat 10-14 days later. To prevent re-infestation, the horses stable, blankets and grooming equipment etc. should too be treated with a suitable insecticide.