A dog's watery eyes may be caused by foreign bodies in the eyes, inverted eyelashes, eye inflammation, eating too salty food, ear and nose diseases, etc. The specific cause needs to be determined based on the dog's condition. If you find that your dog is crying, you should clean the eyes immediately to avoid infection caused by excessive secretions. Try to keep the diet as light as possible. Do not feed greasy, spicy, or irritating food, and let the dog drink more water.