Hi, my Archie (nearly a year old) has been on various foods - all he loved but his system didn't. He was also going 4/5 times a day, very large, soft splats and very stinky at times so I wasn't very happy with any of them (Royal Canin/Simpsons/Simpsons Grain Free).
After lots of consideration (I too, am not keen on raw), I started him on Wainwrights Grain Free wet food just over a week ago and what a difference! He now goes twice a day and stools are very small, firm and not smelly at all, I am one happy bunny! Of course, it may take some time to find just the right food for Sparkie, good luck!