A dog that vomits yellow water and dies within two days may be due to viral infection or pancreatitis. Generally, puppies are more likely to be infected with parvovirus or canine distemper, while adult dogs are more likely to suffer from pancreatitis. Both diseases can cause This can lead to vomiting in dogs, so once an abnormality is discovered in a dog, it is best to send it to a pet hospital for examination and treatment in time to avoid life-threatening injuries.