Dog Difficulty Breathing Through Nose. The causes for why your dog is breathing with a raspy sound can range from mild to serious. Dogs in this state are described as dyspneic.
When it is difficult for your dog to breathe and they appear to have a runny nose, it is common that they will be nauseous, gag and/or vomit. Difficulty breathing is a sign of a labored respiratory system. My dog makes this snoring type sound (like he's having difficulty breathing) throughout the day, and especially when he's sleeping.