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 and Cats. Dog and cat vomiting can be caused by problems from within the stomach and intestines (called the gastrointestinal or GI tract) and by problems from outside the GI tract, such as kidney disease. Common causes of a dog or cat vomiting are allergies, illness, cancer, infections, drugs, parasites, plants, and poisons. Vomiting is also caused by incidents of overeating, foreign bodies, bloat (GDV or gastric dilatation volvulus), and constipation. When your dog or cat vomits, he or she is ejecting food from the mouth that has been in the stomach.