While he was in the hospital (all day), I bought him a water fountain
(which he already loves!) to encourage him to drink more, and did some
very thorough research on food. *He has been eating Evo dry and wet,
but lately more dry (I could kick myself), and lately he has been
under a lot of stress due to a home remodel (so probably not drinking
enough). *The Evo wet looks good with the exception of a surpisingly
low protein content relative to the prescription foods.

When you compare nutritional values, you need to compare the dry
matter basis on the Innova Evo--which excludes the water. If you do
this, you'll find that the Evo has one of the highest protein contents
out there.

An all-canned diet would be an excellent idea for this cat, Innova Evo
is great as is Wellness canned (make sure to get the grain free
varieties) or Nature's Variety canned.

You also need to read this article: http://community-2.webtv.net/getcathelp/urinarytract/