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.
Sometimes an abrupt change in diet can cause vomiting. As long as your dog is acting normally and nothing else appears to be wrong with him, you can treat his vomiting by withholding his food for six to 12 hours if he is a small dog or puppy and for 12 to 24 hours for all other dogs.