Hello:
You haven't mentioned in your post, anything about hairballs. This is the first thing I would look into according to the symptoms you have provided for your cat.
Because of their very clean nature, cats are grooming themselves continually. The result is hairballs. Hairballs that are left untreated can lead to death due to blockages in the intestines or esophagus. The cough that occurs with hairballs will make you think that your cat is dying then and there. It will begin gradually and elevate with the passage of time.
You can purchase hairball remedies at your local pet store or at large discount stores in their animal department. I would try this first. If he shows no improvement over the next week I would recommend taking him in to the vet to look for the underlying cause. If during this time his condition becomes worse, I would take him as soon as possible.
If this information has been helpful to you then please ACCEPT. Let me know if I can help you further.
