Welcome to The Raw Side.
Rad Cat is a good brand. And yes you should see improvements feeding 50/75% raw.
For me personally, I found commercial raw too expensive. Some brands have too much fruits or vegetables (i.e., corn) and bone. And finally, I frankly didn't want to have to go to one more store/run one more errand. to buy commercial raw.
So I have gone with prey model raw. I buy meat, kidney and liver at the local grocery stores when I do my regular shopping. I...