Jilly's right, it seems liek you're giving your fishie too much foods. one or two pelets (if they're realy hungry) is all tehy need for one sitting. if you're guy isn't eating maybe try something else. after testing an trying i now have a buffet of foods for my guys.
this is my two cents...
i've seen the fishies being fed live black worms or blood worm in the store. my guess is that when we bring them home they're expecting the good stuff and won't settle for less. they just have to get used to it, unless you're willing to out and get some live goddies.
but there are pros and cons to live foods. the cons are that unless you receive worms from reputable distributors and they are sterilized, you might be setting up your fishy for a bad day. sometimes (not all the times) they can get parasites from eating live foods that aren't "clean". and you have to watch for frozen foods the same way.
i've heard that getting freeze dried can be ok for treats now n then , but as a staple food in a diet it isn't ggod. some people have reported fishies and ADFs getting internal problems from them. i think it's how the stuff they freeze dry 'em with.
anyways, i've got mine to eat a nice variety, sometimes i'll start them in the morning with a little BettaMin fish flake (just a little), maybe in the evening they can have a worm or two when i feed the frog. but usually i mix it up between flakes, Aqua Culture Betta pellets (careful they can be too big for some bettas) and Hikari Betta Gold.
you should make sure if you give him anything and he accepts it, once he's eating regularly to give him a mixed diet. bettas (like us) need their vitamins too! :love:

ENJOY!! <img src="/images/graemlins/laugh.gif" alt="" />

~ mel