Trial and error. It can come down to texture, so maybe try shredded vs pate, although most wet foods are pate, so start there. Try economical cans, the larger ones. Wellness, EVO, First Mate... avoid fish.

Halo is overpriced. It is one of the most expensive foods with a lot of fillers that don't reflect on it's crazy high price. So drop it ASAP.

 

Try looking at Chewy.com for the best prices online in the USA. Free chat line for excellent help. Try looking at EVO, INNOVA and CALIFORNIA NATURAL. 3 different price points. All good value for the money. Some grain free, some not, depending on your philosophy.

 

If you have an independent locally owned pet food store, a lot of times they will work with you, not just on the selection, but maybe give you reduced price or free samples sizes to try.

I recommend not buying the really big cans or cases until you know what he will or won't eat.

 

I agree with NebraskaCat- my local pet store gave me 4 samples of different brand/styles of wet food in small cans to try. Not worth to spend the money if you're not sure if kitty will like it (at least, not if you don't have to )!

Once you know what works for your cat you can easily order online to save money but I'd start local first.

 

If you order from Chewy.com, make sure you have a month's supply of food on hand. Yes, that's how long they sometimes take. With no apologies.