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I'm sorry that your question wasn't answered in a timely manner. Please let me know if you still need help. May I have an update on your Yorkie, please? Any 13 year who was coughing and now is tachypneic (increased respiratory rate) can be in significant trouble. Congestive heart failure is my primary concern in a miniature dog such as she. Chronic sterile bronchitis and neoplasia (cancer) in the chest cavity are also important considerations.