Sneezing in dogs can be caused by a cold. You can feed him veterinary cold medicine for three to five days, and he will get better twice a day. If the sneezing is caused by environmental allergies, the first thing you need to do is find the allergen and remove it, which is usually caused by dust or pollen, and then feed your dog anti-allergy medication. If the dog only sneezes once or twice a day, it is a normal phenomenon and does not require medication.
