I am VERY glad to you are going to the vet.
It sounds like he is obviously experiencing pain in the mouth or upper GI tract.
I would carefully inspect his mouth and as far back in his throat as you can. Look for any thing foreign, sores, redness, broken teeth, cuts, and that sort of thing.
Dental issues are the most commonly seen condition when cats behave in this manner.
Also he may have swallowed something that he shouldn't have. It could be causing pain, and unable to pass through his stomach, intestines, and bowels on its own.
Those are your 2 main concerns to have your vet look into when you go.
It is very important that you do get him seen. As when a cat stops eating, the liver can become impaired very quickly in cats. As soon as 2 days.
If you can, at least try to hydrate him with a medicine dropper. Try using unflavored pediltye. Just 2 cc every hour for a couple hours.
Let me know what you vet find out.
Thank you for the update.
I am sure he will just fine. Do let me know what your vet discovers.
Since he had some previous dental issues, that is probably the problem.
I do hope it isn't nothing foreign stuck somewhere causing the choking and gaging.
Good luck getting him into the carrier too. I usually wrap my "mean one" in a towel like a mummy then shove her in real fast.
Once you click the accpet button, it will still allow you to come back to the quesion link to respond at any time you want.
The same way you have sent me your replies so far. It doesn't change.
I will cross my fingers for you and you fur baby.
Thank you soo much for the update. That helps me put my mind as ease a little more knowing he is under professional care right now.
I know the guilt you are feeling for leaving at the vet, but he will receive the best care there. Just go and visit him today if you can.
As for the other tests, I hope they all come negative. Hopefully his mouth was just keeping him from eating good all this time.
If it's his thyroid, that can be managed very well with medication. That condition is called hyperthyroidism. It is when the thyroid gland makes too much of a hormone called T4. It speeds the metabolism and causes weight loss, hyper activity, and usually an incredible appetite.
The diabetes can be managed as well with mediation. I just hate to have to see you go through giving daily injections of insulin.
I will be praying for you that is nothing like cancer.
Thank you for allowing me to help you through this. You are a wonderful cat mommy.
Let me know.