as a last ditch effort you might want to try egg yolks, I have raised many fry with it.
you do need to put the babies in a seperate container to do this tho. Hard boil an egg. take out the yolk and mash it. Put in a drop of vitamins if you have any. then put the yolk in a coffee filter or paper towel and squeeze it through the sides and into the water.
it will milky up the water just a little, so you will need to change out some water after each feeding. Let the yolk water stay in about an hour or so for them to eat. (I kind of think they "eat" by default and get a little nutrition). This might get them big enough to eat other foods.