What should I do if my Harrier suddenly has diarrhea? What are the causes?

In the process of raising dogs, there are always some unexpected situations that require owners to increase their knowledge base. I have a friend, his family has a Harry dog, yesterday he reported that the dog has the symptoms of diarrhea, it is estimated that the gastrointestinal problems. In fact, the dog was born with a good constitution, basically will not be sick, then what are the reasons for its diarrhea? The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things. In this case, in addition to adjusting the feeding method, the dog must fast for half a day to a day to digest the food in the stomach and intestines, and then resume a normal diet after the fast. 2. Internal parasites: The dog’s sense of smell is very sensitive and curious, so if the dog is often outdoors and eats something by mistake, it is likely that the intestines will be infected with parasites. This requires owners to train their dogs strictly to know what they can and cannot eat, and to deworm regularly to reduce the symptoms of diarrhea caused by internal parasites. 3. Accidentally eating expired food: If the dog accidentally eats some expired food at home, it will produce diarrhea and may also be accompanied by vomiting. This requires owners to pay special attention to food at home, such as bread, leftover snacks, etc., and try to place them in places where dogs cannot find them, or discard them appropriately. Regardless of whether the food is expired or not, the gastrointestinal tract of the Harrier will be more or less affected after it is mistakenly eaten. When the dog suddenly has diarrhea, the owner should calmly observe to see what causes the illness, and then know how to respond. If the cause of the diarrhea is not clear, it is best to take the dog to the vet for an examination, so as not to delay the best time for treatment.