Have Cat Questions? Ask a Cat Vet Online.
Hello and thanks for trusting me to help you and Chow today. I am a licensed veterinarian with over 25 years experience and would be happy work with you.
The first and most important thing you need to do is to find out why she is coughing. These symptoms can be a sign of pulmonary or heart disease and should be evaluated by with a thorough physical exam including evaluation of the heart and lung sounds. Cardiac causes can include heartworm as well as heart valve or heart muscle disease called cardiomyopathy. Lung disease can include bronchitis, pneumonia, parasites or even asthma which can be serious if not identified and treated. There really are no effective home treatments until we have a better idea of what is causing the cough.
Secondly, it sounds as his weight is contributing to his symptoms (it is not however the cause of his cough). I would talk to your vet about ideas on how to decrease his weight. This is often easily accomplished by getting him off of dry food and switching to a wet food only diet. Dry cat foods have far too many carbohydrates for a cat and can lead to weight gain.
Hopefully your vet will help to identify the cause of the cough and help to get him to a healthy weight so that he will be feeling better soon.
I hope this is helpful. Please let me know if you have ANY other questions. My goal is to give you 100% satisfaction and if you are not yet satisfied, please reply so I can clarify for you.
You really need to start with a physical exam to get to the bottom of why he is coughing. After the exam, your vet will be able to tell you his body score and how much he should weigh. That will help to determine what and how much to feed of wet or dry food.