I'm thinking about switching our ferret over to Taste Of The Wild cat food since he's still being picky about his ferret food. 
I would love to get feedback on what I need to look for in a good quality cat food what does the protein, crude fat, fiber, moisture, etc need to be at? Right now TOTW is 42/18/3/10 do these need to be higher or lower? And recommendations and suggestions and anything in between would be great! Currently I have all 3 fuzzies on Zupreem but the oldest one is being picky. And he is starting not to eat the ferret food again.... I was also told by my vet to ditch all vitamins and supplements bc of the sugar content. Any treat recommendations are welcome too!! I also have cubes of "duck soup" frozen. It's there ferret food with chicken baby food combined.