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 in Dogs. Vomiting is common in dogs and can be acute (sudden onset), or chronic (occurs over a period of time). This page looks at the signs, the possible causes, when to see a vet, and the general care of dog vomiting. Dog vomiting is a symptom that is, to a certain extent, quite normal.f your dog suffers from chronic vomiting, or if she shows any of the following symptoms, take her to the veterinarian right away: 1  If the dog is vomiting more than 2-4 times a day. 2  If the vomit is foamy. 3  If there is blood in the vomitus. 4  If the vomitus is foul-smelling. 5  If the dog is weak or dehydrated *.