The dog snorting vigorously through the nose may be caused by a cold, foreign matter in the nose, hot weather, or rhinitis. You need to first check whether there is foreign matter in the dog's nose, and then observe whether the dog has other abnormalities. If you have a runny nose, low energy, etc., it may be a cold, and you need to pay attention to keeping your dog warm; if the weather is hot, it is best to help your dog dissipate heat to avoid heatstroke.