If the white mucus is transparent and with fine foam, it may be caused by acute gastroenteritis and other gastrointestinal discomfort; 2. If the white foam is accompanied by loss of appetite and frequent vomiting, it may also be caused by the dog swallowing a foreign body by mistake; 3. If the dog not only vomits white foam, and acute convulsions, fever and diarrhea, most of them are caused by distemper and polio. If the dog is not only vomiting at the mouth, but also has acute convulsions, fever and diarrhea, most of them are caused by the development of canine distemper and polio and other virulent diseases to the middle and late stages, and need to seek medical attention. Of course, if it is just a simple foaming at the mouth, and the amount is small, there is no mental discomfort and other abnormalities, then most of them are caused by strenuous exercise or hunger, most of the dogs are more active at this time, the owner can observe for a while, add some water or food to the dog, if the dog is very fast and interested in eating, then generally are no big problem. If the dog has a fever, runny nose, convulsions and other symptoms, then foaming at the mouth is very likely to be caused by disease, so it is necessary to regularly give the golden hair a medical examination.
