My feral, who has been coming to the house every day for 12 years, has all of a sudden stopped eating wet food. He eats the dry but picks through the wet. I've tried all brands but he's not interested. He was eating Fussy Cat for a long time then stopped. I tried others but nope. I put canned tuna on top and he picked that off and left the canned. I can't afford to keep buying different brands and have him ignore them. He love the Delectables that come in a pouch but they are meant as a treat that he gets in the evening. Any suggestions?