We just went through the same exact thing with Lucky.


After all the tests and lots of big $$$$

Turns out, it was a fairly simple thing:

He is allergic to his food - all our cats eat Science Diet.

Now, he is on their z/d diet - which consist of NO wheat/corn by products.

It works!!! Yippee!! Although expensive (of course!) no more vomiting!!

You might check with your vet on being allergic to his food.

Good luck!!!