What Causes My Dog To Suddenly Start Sneezing?

Occasional sneezing in dogs is not sign of serious illness. Sneezing is normal response of body against irritation in the air passage.  Sneezing and nasal discharge usually occur at same times. There are many factors that can cause these nasal irritations. These can be

1. Allergies
2. Viral infection
3. Fungal infection
   
4. Bacterial infection
5. Foreign bodies in the nasal passage
6. Nasal tumors
7. Chronic dental disease

Each cause is treated differently. So, ideally, your local vet can help.