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.
Causes of dogs throwing up white foam. Some of the common causes of a dog throwing up white foam are listed below: Reflux Gastritis or Bilious Vomiting Syndrome: If your dog throws up white-yellowish foam soon after awakening in the morning, then it may have bilious vomiting syndrome. It is a common digestive condition affecting dogs which arises due to acids buildup in the stomach.