This spray from Groom Away is a natural - Anti parasite spray – is especially for horses and other large animals that suffer from parasitic problems. It is a quick acting natural formula that rids animals of all types of biting and sucking lice, mites, midge, ticks, mosquito, black flies as well as helping to prevent fly eye. Spray directly to areas normally prone to Bot egg infestation. Apply directly where infestation exists and will relieve the animal of all known ectoparasites for up to 24 Hours. Due to the quality of the natural ingredients, it can be applied to raw, inflamed and irritated areas to help soothe and calm. Use sparingly if used on large dogs