When A Dog Is Always Swallowing. Rhinitis and sinusitis the clinical signs that cause both diseases are sneezing, thick nasal discharge with a bad smell and nausea due to the postnasal drip that occurs. Your dog has been swallowing more air.

The vet is also able to examine your gums and teeth. When a dog has esophagitis, he might wind up regurgitating his food. This swallowing occurs occasionally during the day particularly when drinking, eating or talking.