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.
Vomiting is one of the main symptoms of intestinal blockage, though the frequency, type of vomiting and consistency of the vomit vary based on the location of the blockage. Partial blockages cause intermittent vomiting that can include pieces of food.f you notice your dog is not passing regular bowel movements, an intestinal blockage may be to blame. A complete blockage prevents any stool from passing. With a partial blockage, small amounts of stool can pass, but you may notice your dog straining when he tries to go.