o.0 not flakes, but the Hikari brand Gold, goldfish pellets. i can get some off a site for free, but i'd rather not, if they can't eat them. i read the ingredients, and didn't see much that wasn't good for them, but i'd rather ask, than get it and they can't eat them. >.>;
i'm just curious! it's free, food, and pellets. :d
Also, I'd like to add that your fish might "like" flakes, but that doesn't mean they're good for your betta. (I LOVE chips and cookies! lol) And, the first ingredient is fish meal that you listed.... think of fish meal as all the leftover crud once all the "good stuff" is taken from a fish..... and then grind it all up. Viola! Fish meal! lol Also, lots of stuff in poorer quality foods isn't able to be used by your fish... in one end and right out the other. Nothing gained from it.
Like humanoid foods focus on the back label of your present goldfish flakes and read the ingredients and nutrition stats. Compare it with a betta food brand. Betta's being carnivores do need protein in their diet.