1. Tracheal Collapse: This is a common condition in small-breed dogs, especially Chihuahuas. Their windpipes are naturally narrower, and excitement can cause them to collapse, leading to a characteristic "goose honking" cough.
2. Reverse Sneezing: This is a forceful expulsion of air from the nose and mouth that can sound like coughing. It's caused by irritation in the nasal passages and is often triggered by excitement or even eating.
3. Kennel Cough: This is a highly contagious respiratory infection that can cause coughing, particularly in stressful situations like when a dog is excited.
4. Allergies: Chihuahuas can be prone to allergies, and excitement can sometimes trigger coughing due to irritation of the airways.
5. Underlying Health Conditions: While excitement might trigger coughing, it could also be a symptom of a more serious issue, like heartworm, pneumonia, or a collapsed trachea.
It's important to note: If your Chihuahua coughs frequently, regardless of excitement, it's essential to consult a veterinarian. They can diagnose the underlying cause and recommend appropriate treatment.