Reverse sneezing is a condition that can occur at any time in your Boston Terrier's life. Generally it occurs when your dog is overly excited, gulps his food too fast, or is affected by pollen in the air. Nasal secretions drop onto the soft palate, causing it to close over the windpipe. The dog makes a wheezing sound and may become alarmed
Read more at http://dogtime.com/dog-breeds/boston-terrier#rFHApErGgcx9kcth.99