Andrea Lam, a board-certified veterinary dermatologist and assistant clinical professor at the Cummings School, gives a suggestion
That certainly might be the case. Veterinarians are starting to recognize that both sneezing and asthma in dogs can be caused by allergic reactions to pollen, weeds, dust, mold and cigarette smoke. Often, we can successfully treat these dogs with allergy injections.
However, sneezing in dogs has many different causes. A fungus, virus or bacterial infection, such as a sinus infection, can be at the root of sneezing.
A foreign object as small as a blade of grass stuck in a puppy’s nose can cause it to sneeze. In older dogs, nasal discharge or a bloody nose, in addition to sneezing, may be a sign of a nasal tumor.
So when your dog is sneezing, it’s best not to assume it’s simply seasonal allergies. Always start with a visit to your family vet for a thorough exam to rule out other things first.