You can shave frozen bloodworms with a small pair of scissors and they will probably take that now. I feed small 1/2" fry shaved bloodworms all the time and they love it. I'd try to get them on some kind of micro-pellet too because it'll balance out their diet. I fed some tiny granules to my fish that I got from a local breeder. I think they were NLS or something. My fish also like the tiny Hikari First Bites or whatever they're called, they come in a small pouch.
