As Catofstripes says, he may change his mind next week or he may really dislike the taste of it and stick to that opinion. Either way, you aren’t likely to starve him into submission.

Poor old cat. You shouldn’t tease him, his nose is probably telling him it’s shit, just like my nose tells me the same whenever I feed the beasts.

Next week, he’ll probably eat it, but you’ll never buy it again, just in case he doesn’t. Or get another cat, competition for food does wonders.