Hey,
I've been transitioning my two adult cats (approx ages 2 & 3 but who really knows!) to raw over the period of about a month - 6 weeks now. I use Aunt Jeni's (
www.auntjeni.com) - it's all organic and not expensive. It's made in NJ (which for me is pretty local) and sold frozen in 1 lb. tubs. Anyway, I tried my cats on just raw chicken, raw fish - wouldn't touch any of it. When I tried Aunt Jeni's, I put a little hot water over it and then covered it with their kibble (organic, healthy kibble) they'd been eating. They ate it all.
Slowlly, I've been moving away from the kibble - now I use more raw, and just a sprinkling of kibble over it. Now, it's been 6 weeks or so, and if I don't put any kibble they won't eat it...but if I put just like 8 pieces of kibble, they'll eat it all! Nutty girls, they are!
So, transition time is key. And some cats just won't go for it ever, in which case I recommend (I'm a professional pet sitter) switching to a very high-quality, grain-free kibble, such as Innova Evo. And you can always wet the kibble to "rehydrate" it a tiny bit (for what thats worth) and/or use wet food (again, high quality, grain-free).
Always keep in mind that cats are one of the most pure carnivores out there, so grains are ENTIRELY UNNECESSARY, and veggies should be kept at a minimum. Fowl and other winged animals are most natural to a cat, and, of course, if you are like me and live in an old house in an old city...your cats might be lucky enough to catch mice! ;)
Good luck!