Well, the first thing is to find some wet that he likes -

He "likes" most of them, at least well enough to suck all the juice
out of them, and he does eat quite a bit, but he always begs for the
dry stuff. My quest is to find a canned food that isn't loaded with
carbs. I've found some, but they're few and far between. Most canned
foods have grains or "garden veggies" in them (cats aren't supposed to
eat spinach and potates!), and you really have to read the labels to
figure out what's in there. Then you're not really sure. I bet if I
gave him one of those carb-rich canned foods, he'd eat it right up!
He does love "tuna juice" - the water that you squeeze out of a can
of tuna fish prior to making a sandwich, but if a few pieces of tuna
get in there, he leaves them in the dish (foolish cat!).