Trouble Breathing Dog 10+ Years

Based on the history you provided, the following are the most likely causes for your dog’s trouble breathing. Not listed here but a possibility for trouble breathing at this advanced age is cancer of the upper or lower respiratory system, seen as primary disease in some cases, but also commonly present secondarily as spread from another primary cancer elsewhere in the body. Again, we cannot emphasize enough that trouble breathing is a medical emergency and a veterinary visit is recommended ASAP. If you still seek further information, please visit our
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Chronic allergic tracheobronchitis
Collapsing Trachea
Congestive heart failure
Complications from heart murmur
Heartworm
Kennel cough
Pneumonia