This is not by any means a common ailment amongst pigs, but it is very hereditary. The most common cause is too close breeding. The bones and joints appear to be unequal to the performance of their duties, the pig staggers and stumbles when it attempts to move, whilst sometimes the back is affected, when the pig is stated to be suffering from "swayback." As a rule treatment is inadvisable as recovery is doubtful. The first loss by knocking the pig on the head is generally the least. TUBERCULOSIS Pigs, like unto human beings, are much subject to tuberculosis when they are kept under conditions similar to those which result in human beings becoming affected. The disease is highly infectious, pigs coming in contact with or even being housed in sties where pigs affected have been recently kept are very likely to become infected. Some persons declare that tuberculosis, or, as it is more commonly called, consumption, is hereditary. For this there does not appear to be any foundation. The chief thing to prevent one's animals being affected is to keep them away from contagion. Although many parts of the body may be attacked by tuberculosis, the lungs are more frequently affected than any other of the organs, owing probably to the ease with which infection by the minute germ is conveyed to the lungs in the act of breathing. In the past a considerable number of pigs became infected through being fed on skim milk which contained germs from the udder of a cow suffering from a tuberculous udder. In these cases of the lungs and the bowels becoming tubercular, the pigs become unthrifty and frequently waste away and die. When the bones and other portions of the body are attacked the development of the disease is not so rapid, but in any case the wisest plan is to destroy the animal and thoroughly disinfect the place in which it has been kept. Save when the disease is local and of very limited duration the meat of a pig suffering from tuberculosis is unfit for human consumption. WORMS Pigs are subject to various kinds of worms. Of these the most serious by far is the worm which causes the disease called Trichinosis in man. The worms are transmitted to man in pork from a diseased pig. Thorough cooking of meat appears to destroy the vitality of the worm, but in foreign countries where the pork is eaten in an uncooked or an undercooked condition the disease is not uncommon. Fortunately, Trichinosis is almost unknown in this country, owing to our more stringent sanitary conditions, the disease being due in the pig to the eating of human excrement in which are thread worms.