Hi there!
My dog Rufus had a sneezing problem a couple of months ago. He started to sneeze every few minutes, every day while awake for about a week and a half staright. His lip would quiver, face would contort and twitch and he would seeeze and sneeze, wet ones too! When he was done he would sit there looking sad.

At first I thought it was alergies since he had been alergic before and I had just changed the brand of my laundry detergent, fabric softner and my perfume all at the same time, I figured he was irritated by one of the products. I gave him Benadryl and stopped using all the new products but it did not help.

Because the sneezing lasted so long I called the vet. The vet had us bring him in since an allergic reaction would not be that severe for so long witout any improvement. For once, his symptoms did not miraculously dissapear upon arrival to the vet's office and he showed the vet just how much he was sneezing. She checked for nasal blockage, pehaps he had inhailed something and it was stuck, right? Nope, all clear! She then said it may be nasal mites and gave him a shot. If the shot helped he probably did have mites and he was to come back for a second shot in 10 days. She never actually tested for mites but the next day he sneezed twice and the day after that once. He went for his second shot and has not sneezed since, I am even using all the new products again. Allergies were ruled out as the shot would not have helped the alergies and it was chalked up to mites he could have picked up at the off leash dog park.

I wouldn't worry too much about occassional sneezing. I just thought I would share my story in case it helps. Rufus is my first dog ever and I always like to check with the vet if I am not sure.