_Bronchitis_ is probably the most common complication; in fact, it is always present, except in very mild cases. The cough becomes more severe, and often comes on in tearing paroxysms, causing sickness and vomiting. The breathing is short and frequent, the mouth hot and filled with viscid saliva, while very often the bowels are constipated. If the liver becomes involved, we shall very soon have the jaundiced eye and the yellow skin. _Diarrhoea_ is another very common complication. We have frequent purging and, maybe, sickness and vomiting. _Fits_ of a convulsive character are frequent concomitants of distemper. _Epilepsy_ is sometimes seen, owing, no doubt, to degeneration of the nerve centres caused by blood-poisoning. There are many other complications, and skin complaints are common after it. _Treatment_--This consists firstly in doing all in our power to guide the specific catarrhal fever to a safe termination; and, secondly, in watching for and combating complications. Whenever we see a young dog ailing, losing appetite, exhibiting catarrhal symptoms, and getting thin, with a rise in temperature, we should not lose an hour. If he be an indoor dog, find him a good bed in a clean, well-ventilated apartment, free from lumber and free from dirt. If it be summer, have all the windows out or opened; if winter, a little fire will be necessary, but have half the window opened at the same time; only take precautions against his lying in a draught. Fresh air in cases of distemper, and, indeed, in fevers of all kinds, cannot be too highly extolled. The more rest the dog has the better; he must be kept free from excitement, and care must be taken to guard him against cold and wet when he goes out of doors to obey the calls of Nature. The most perfect cleanliness must be enjoined, and disinfectants used, such as permanganate of potash, carbolic acid, Pearson's, or Izal. If the sick dog, on the other hand, be one of a kennel of dogs, then quarantine must be adopted. The hospital should be quite removed from the vicinity of all other dogs, and as soon as the animal is taken from the kennel the latter should be thoroughly cleansed and disinfected, and the other dogs kept warm and dry, well fed, and moderately exercised. _Food and Drink_--For the first three or four days let the food be light and easily digested. In order to induce the animal to take it, it should be as palatable as possible. For small dogs you cannot have anything better than milk porridge. [1] At all events, the dog must, if possible, be induced to eat; he must not be "horned" unless there be great emaciation; he must not over-eat, but what he gets must be good. As to drink, dogs usually prefer clean cold water, and we cannot do harm by mixing therewith a little plain nitre. [1] Oatmeal porridge made with milk instead of water.