More and more vets as well as owners are starting to see how poorly cats (and especially Bengals) do on dry cat food.
If he had wet food, switch him to wet food. Dry food can cause all sorts of issues.
Here's a post we did on food in general (we advocate raw food and failing that dry food).https://www.ontariobengals.com/2017/01/16/raw-feeding/
Some info from the post:
A quality canned wet food is way better than dry food. It’s got high water content and is usually animal based protein with much lower carbohydrate content.
Dry food has been long suspected to cause urinary tract issues and diabetes. This poor diet leads to dehydrated cats.
Highly recommend switching to any wet food.