The signs and symptoms listed below is just a clip of ACVS's article.
"Dogs with elongated soft palates generally have a history of noisy breathing, especially upon inspiration (breathing inward). Some dogs will retch or gag, especially while swallowing. Exercise intolerance, cyanosis (blue tongue and gums from lack of oxygen), and occasional collapse are common, especially following over-activity, excitement, or excessive heat or humidity. Many dogs with elongated soft palates prefer to sleep on their backs. This is probably because this position allows the soft palate tissue to fall away from the larynx. The signs associated with stenotic nares and everted laryngeal saccules are similar."
Image on left is a stenotic which is malformed nostrils that are narrow or collapse inward during inhalation, making it difficult for the dog to breathe through its nose. Image on the right is a normal nose.
To see detailed photos and find out more on what happens during the physical exam, the treatment options, and the recovery period, visit their website by clicking here.