This is an excellent food - well planned, high-protein, and as close as you can get to 'ancestral diet' for your kitty without going raw. It's grain-free, and avoids many of the poor-quality proteins that many cheap foods have. This particular flavour is great because it has an emphasis on easily-digested protein: fish. My only challenge with EVO is that my cat's don't love it. They will eat it, but with some hesitation... kind of like me and health food. That is the reason I have to rate it lower on effectiveness.