asked

My 13-year-old male Chihuahua named Leo has been coughing a lot for the past two months. He has been on Clavamox and I've also given him Benadryl, which stops the coughing. Leo doesn't cough when he's sleeping or lying down, but starts again once the Benadryl wears off. The vet mentioned he has a light heart murmur. What could be causing the coughing and what should I do next?

August 4th, 2024

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