feeding my fry

we have breed some betta's n the fry have now hatched, they are 3 weeks old today, we have now lost loads n am down to about 5 now, n are feedin them on newly hatched brine shrimes but they just ay hatchin fast enough, so on the day that they don't hatch we'm havin to feed them on the liquify so they get something, is there anything else i could feed them on. would really like no to lose what's left.