Well, I have two Bettas that will not even touch pellets.

My other two literally jump out of the water when they see the pellets! I have FD bloodworms, but I know I shouldn't be giving these more then twice a week. But, Pax and Rune will NOT touch anything else. I'm hatching brine shrimp right now, but I've read they can cause constipation if feed too often, and I don't want more SBD! I've had enough of that will Pax. So, what should I do? I might be able to get my hands on some Guppy fry or something like that... IDK, anything for my guys.
Thanks!!!