Hi Akari 32:
I understand the question as I had the same when I first started researching the best diet for my cats. In my opinion, Dr. Pierson has the best explanation to your question, so I would have to refer you to her website; I would just butcher and confuse the subject of wet vs. dry food for cats! She does a great job of explaining what has to go on in order for a cat to digest dry food and the reason it is so taxing on their bodies.
Ultimately he is in your hands and you will have to decide what you feel is best for him. But I do feel strongly about getting him to the Vet ASAP so you can find out for certain if he has UTI issues.
