Sounds like you feed yours the same way we feed Murphy with the restricted diet, catnip and cat grass, and occasional plain meat as a treat.
The Forza has been great. I just found it on Chewy and have been feeding it to Murphy for maybe 3 years now. His blood and kidney levels have been coming back good so the vet said “just keep doing what you’re doing.”
I just feel like he has been eating less lately so just looking for alternatives to maybe entice his appetite. I know he’s old and could just be in decline but we will keep trying until it’s time to say goodbye. He is due for a vet visit though, so we’ll see what they say.