This guide offers an explanation of the cause, prevention and treatment of parasitic infestation and diseases of the skin of the horse, for the horse owner and student. It is the third in the Allen Veterinary Handbook series, following Lameness and Respiratory Disease by the same author. Gray addresses such diverse matters as: worm control; pasture management; the cause and treatment of sweet itch and ringworm; and the eradication of mites, lice, bots and other unwelcome parasites to which the horse can be an unwilling host. Fly control is also covered, as are warts and a variety of infections and diseases of the skin.