Could you tell us some more about your cat? How old is he and how long have you had him? Is he just a picky eater or is he refusing to eat at all? What do you feed him on?
The more information you can give us the better suggestions we can make.
If it's just one flavour that he doesn't like it's not such a big problem. As long as you can get him to eat something you don't need to worry about him eating every flavour of a brand. Most cats have their favourites and have ones they won't touch.
If he prefers the chicken and other meat flavours there is nothing wrong with feeding him those.