I saw yesterday's post about not eating.
Here are some things to try. And if he eats these readily, you'll know it's just he's not liking his food choices.
fried chicken.... from a store or restaurant.... peel off the fried skin and give him the meat inside.
deli meats .... read the label.... pastrami is good, turkey, chicken..... mine loves ham but it's hard to find it without sugar.....but you 've got to get some food.
human can of tuna.....
if these work, you can try putting some on his canned food to get him to eat that too.
also.... if you boil chicken, does he like that? Mine won't eat it but some cats love it.