Sudden Throwup White Foam. Gastric torsion due to several factors, a dog’s stomach can sometimes get twisted in a way so that the air, liquids and food inside are completely trapped, without being able to move to the intestine or be. Your cat’s stomach contains a small amount of fluid and mucus between meals, and this fluid and mucus results in white, foamy vomit.

Throwing up is not a disease in itself but can be a symptom of many underlying diseases. With white foam, there is no food present in the throw up. Your veterinarian can help you figure out what is ailing your cat and how to help bring your pet relief.