My 2 are grazers.
I have one(casper) that can't have canned. Even a tiny bit makes him throw up. He's been like this since a kitten. And trust me, test have been done. He has a very sensitive tummy to wet food. Dry is the only thing he can eat.
Winnie gets canned. But she's not a big eater. She has a tsp and she's happy. Dry is left out. So when I'm gone all day, which can be as long as 16 hours, I know they will not starve.