According to VetInfo, a trusted resource for veterinary medicine, wheezing and a runny nose often occur as the result of an allergy. An allergy is an overreaction of the immune system to a non-pathogenic agent. Allergies can occur at any time during a dog's life, and some dogs exhibit symptoms, such as a runny nose, in the early spring or fall.Continue Reading
VetInfo notes that seasonal symptoms resolve themselves during other parts of the year. Besides seasonal allergies, dogs can display wheezing, coughing or a runny nose when they are exposed to dust, mold or cleaning chemicals. Allergies are typically treated by the removal of allergy-producing substances from a dog's surroundings or by treating the dog with an anti-allergy medicine.
According to VCA Animal Hospitals, which are represented in 42 states and four Canadian provinces, the most prevalent symptom of an allergy in a dog is itching, followed by allergies of the respiratory tract and digestive system. Any suspected allergic response should be checked by a veterinarian. Allergies are common in all dog breeds and appear after a dog is 6 months old. Most dogs are affected by some type of allergy by the time they are around 2 years old.Learn more about Veterinary Health