TREATMENT: Consists of using various dips, as Lime and Sulphur, which is recommended by the United States Bureau of Animal Industry. This is very effective and inexpensive. Scabby sheep should be dipped a week or ten days after shearing; two dippings are necessary at the interval of ten days. After dipping, move to non-infected range or pastures. TICK (Louse Fly) CAUSE: The tick that infects sheep has a very small head sunken into its round body. The head possesses a flexible trunk or snout that penetrates the skin. Through this trunk, the ticks derive their nourishment by sucking the blood from the body of the sheep. The tick is also provided with three pairs of legs. The female lays her young in the form of a spun egg (cocoon) which is oblong in shape and brown in color. This egg is cemented to the wool of sheep where young ticks are hatched in about four to six weeks. SYMPTOMS: Long wooled sheep are more susceptible to this tick as their wool provides shelter for both the tick and its eggs. After shearing the sheep the ticks have a tendency to leave the body and to migrate to the legs or to unshorn lambs where their snouts or trunks pierce the skin which appears to become infected, producing a swelling and inflammation. The infected sheep run, scratch and bite themselves. When these ticks become developed in large quantities, they produce a paleness of the mucous membranes of the eyes, mouth and nose, as the ticks suck large quantities of blood, which produces an anemic condition. The sheep become poor, weak and unthrifty. TREATMENT: Satisfactorily treated by dipping infected sheep in Coal Tar dips or Emulsions of Crude Petroleum. Shearing the sheep has a good effect, but care must be exercised as the ticks then rapidly migrate to the lambs. DISEASES OF POULTRY Causes, Symptoms and Treatments [Illustration: Photograph of several chickens.] White Plymouth Rocks, Raycroft Farm, Adrian, Mich. CHAPTER V AIR SAC MITE CAUSE: Produced by a parasite called Cylodites Nudus, which bears a close resemblance to the parasite causing mange or scabies in the domesticated animal. Owing to the peculiar construction of their breathing organs fowls are more susceptible to parasites than animals. In addition to affecting the lungs, the Air Sac Mite may extend its operations to the intestines, kidneys, liver and bones. SYMPTOMS: Unthriftiness is first noticed, but after the parasites become numerous, the fowl shows signs of difficult breathing, perhaps terminating in bronchial pneumonia. In some cases death occurs without apparent cause. The bird will be inactive, becomes separated from the rest of the flock, comb pale, head drawn close to the body, wings hang pendulous, lose flesh, breathing becomes hard, coughing, sneezing and a rattling from the mucus in the windpipe is heard. Death is produced from suffocation.