I cant seem to get any of my three bichirs to eat carnivore pellets, there the hikari brand, ive tried several times and they spit them out and make a huge mess with red crap floating all around. is there a trick or something, right now Ive been feeding them shrimp, silversides, squid and have tried going days with just offering carni pellets but that just seems to make them mad. everyone is always saying that carni pellets are so great, so what am I doing wrong, they hate the stuff