I think I'm with Sharky (if she's saying what I think she is, but this is my interpretation) on high protein diets not necessarily being detrimental to kidney health, or detrimental to kitties who have kidney problems.. but I think that's based on a raw diet not a raw-based dry diet.. from what I've seen the research or.. I guess I should say animals living on raw diets, a lot things have gone away in cats with IBS, or prone to UTI.. etc. That's based on an actual raw diet though.. and those are extremely high in moisture..
But, back on track, Moggie..sorry for the detour.. um.. ash was the ingredient that I couldn't remember.. also.. my domestic, Noel, was very much like yours where she just wouldn't eat wet food until after I switched her to the Evo. Now.. I never really did try the whole taking her food away and letting her get hungry prior to the Evo, so.. when she had her surgery and I had to medicate her, I was sticking it in her wet food, and prior to this.. she'd just lick the gravy/juice up and that was the end of it. It worked, though, after she started Evo. Now, since I didn't really test that theory, I can't really even call it a theory,
however.. maybe it's that she's getting more of a taste for protein and is liking the wet better. I don't know.
I have not heard anything about Evo contributing to healthy cats contracting UTI or kidney problems. I think if you're planning to use this as a liason between getting them off of dry, over to wet, and then on to raw.. I don't think it would cause any harm, specifically for a short period of time. Mine are doing very well on it (they've only been on it for 4 or 5 weeks, though). Mine are also all girls, except Kahn, who only eats raw.