TREATMENT.—Rickets can be prevented by careful feeding on suitable foods and keeping the dog clean in well ventilated kennels, where he can get plenty of exercise. Whenever a litter of several pups show symptoms of the disease, the character of the food should be looked into, and if faulty corrected by adding to it medicines or food containing required elements. It is hardly practical to use medical treatment other than bitter tonics. Unless the disease is in an advanced stage, it can usually be controlled by careful feeding of a ration rich in inorganic substances, as bone dust, lime water, and crushed egg shells, with a view of supplying calcareous matter to the system. This can be fed to the bitch nursing the pups or, if the pups are weaned, feed them carefully. RINGWORM CAUSE.—Dogs may become infected with Ringworm by coming in contact with infected dogs, or by being shipped in crates or boxes in which infected dogs have recently been transported, or by using blankets, brushes, collars, etc., which have been recently used by infected dogs. SYMPTOMS.—Small red spots first appear on the skin, gradually enlarging, and are covered with a thin, grayish scale, under which is found a serum. The hair falls out as a result of the infection of the skin by the parasite. The outside of the affected patches is red, while the inner portion takes on a grayish-white color, giving it a ring appearance. This condition is followed by severe itching; the dog rubs and scratches severely. TREATMENT.—The most effective drug is Tincture of Iodine, applied once daily with a brush. Great care must be exercised, as this disease may be transmitted to man, and to all domestic animals. Sanitary surroundings and good, clean food, that is easily digested, assists materially in eradicating the parasites. ROUNDWORMS (_Maw Worms_) This worm is commonly seen infesting the intestines of puppies. The body is generally white in color and slightly curved at the head. This worm has a stiff, wiry appearance, and measures from one to three and one-half inches in length. SYMPTOMS.—Puppies are more susceptible to these worms, although we find them in aged dogs. About fifty per cent of the dogs are infested with these worms. They cause irritation of the intestines, irregularity of digestion, diarrhoea, colic, nervousness, constipation, irregular appetite and a rough, dry, unthrifty appearance of the hair and skin, and the dog becomes emaciated. After this worm migrates into the stomach, it causes nausea and vomiting, occasionally the bowels are filled with large masses of these worms, and their passage aids in determining the cause of the dog’s debility.