Dogs with diarrhea do not necessarily need to fast for 24 hours, depending on the specific situation of the dog. If the dog only has mild diarrhea, is in good spirits, and has a normal appetite, the owner can appropriately feed it some probiotics to regulate its gastrointestinal condition without completely fasting.

However, if the dog has frequent diarrhea, is in a poor mental state, or has vomiting, fever, etc. If symptoms appear, it is recommended to fast for 12 to 24 hours to reduce the burden on the gastrointestinal tract and prevent diarrhea from becoming more serious. During the fasting period, owners need to prepare sufficient drinking water for their dogs to prevent dehydration caused by lack of water due to diarrhea.