Dogs that eat too much probiotics may suffer adverse reactions such as diarrhea, so they need to be fed accurately according to the dosage on the instructions, and not too much at one time. Normal dogs do not need to be fed probiotics regularly if they are not sick. If the dog has vomiting, diarrhea, constipation, loss of appetite, etc., the dog needs to be fed probiotics, which can help regulate the gastrointestinal flora of the dog.