sickness in dogs symptoms
The symptoms of altitude sickness are mainly due to the fact that the dog gets dehydrated and is unable to breathe normally. 1  The symptoms of altitude sickness in dogs may include: 2  Panting. 3  Excessive drooling. 4  Vomiting. 5  Pale gums. 6  Bleeding from the nose and retina (only in extreme cases) 7  Increased pulse. 8  Dry cough.