A dog that vomits white mucus and dies may be caused by acute gastroenteritis, food poisoning, epilepsy and other diseases. If it is not discovered in time, the condition will be more serious and it will die. Pay more attention to your diet and avoid feeding foods that are difficult to digest. There are many foods that dogs cannot eat, such as chocolate, grapes, raw meat, sharp bones, high-salt foods, etc., which can easily cause gastrointestinal discomfort. You can feed probiotics appropriately to help dogs. Dogs regulate their intestinal flora to help with digestion. Do not place toxic or dangerous items where your dog may encounter them.