I tried crushing high quality pellets into a fine dust and noticed that they will eat it but end up spitting it back out. Today I tried cutting up blood worms (which is so time consuming) and noticed that only 4-5 of them will eat it and swallow. The rest eat and spit. Dunno what to make of it. I mean they eat DEAD bbs all the time, why not frozen blood worms or frozen adult brine shrimp. lolI have also had some luck crushing pellets into very fine crumbs, almost dust, I try to introduce it to my fry from around 8-10 weeks initially they will eat it when its in the water column but not off the bottom so use it sparingly when you first do it as you will need to siphon out any excess.
As others have said I'd still continue with BBS for most feeds, the crushed pallets is just a way to mix up their diet and not be so dependent on the BBS