Reverse Sneezing - your dog may make a loud snorting or inhaling sound that's best described as reverse sneezing. Although the episode may be unnerving, it's usually harmless caused by leash pulling or excited. Massaging the throat, offering something to lick, or placing your fingers over the nostrils may cause him to swallow, which may stop the sneeze. But check with your vet if it happens often. It may be a sign of allergies, mites, infection, foreign body, or another medical condition.