Eastern Bloc countries such as the Soviet Union had high rates of population growth. In 1917, the population of Russia in its present borders was 91 million. Despite the destruction in the Civil War, the population grew to 92.7 million in 1926. In 1939, the population increased by 17 percent to 108.
Causes of Chronic Vomiting in Dogs Chronic vomiting can be caused by diseases of the gastrointestinal tract or can occur secondary to other systemic diseases. It is important to try to establish the cause of chronic vomiting.
Obstructions of the large intestine, lower down in the intestinal tract, causes your dog to produce vomit that is dark brown in color and has an odor of stool. These is because your dog is vomiting up feces that can't pass through his intestinal tract due to blockage. Dogs with intestinal blockage may be most likely to vomit after eating. Other symptoms of intestinal blockage in dogs include: 1  lack of appetite. 2  weight loss and anorexia. 3  diarrhea. 4  weakness.