We switched four cats (13y/o fat boy, 4 y/o FAT girl, two 1y/o cats).
Let me just tell you, it took us EIGHT MONTHS to switch everyone to raw only. So don't feel rushed. It will take a while.
We did it this way:
Week 1-2 - tsp or less or ground raw in canned.
Week 3-4 - 2 tsp of ground raw in canned
Week 5-6 - 3 tsp of ground raw in canned
If the cats turn their noses up at the 2tsp on week three, go an extra week with only ONE tsp in.. don't force anyone to eat it. The ones who already LIKE the raw can have some chopped up heart along side or mixed in, too. BUT, we went by the slowest member to switch and no faster than him for everyone.
At one point, we were at a hunk of ground raw and a smear of wet. Then we just stopped giving wet completely, and started to transistion them all to CHUNKS instead of the ground they had previously been getting. Now they'll eat ribs and wings, etc no problems.
Goodluck! It is possible, especially if I can get a 13 year old who until the kittens came that year had only ever eaten DRY FOOD (and Iams to boot!) to switch over in just under a year.