I feed my fry that still have the yolk sacs all the time and it really does get them off to a good start with the growth. BUT, I don't give them anything until they can get upright. At this stage they are probably still laying on the bottom on their sides and food is rather difficult to eat. When they can get upright and even before they can actually swim then it is time for the food and yes, only small amounts. I use Better Than Brine Shrimp, which I bring in from the U.S. but crushed flakes, etc. will work too. The reason I like the BBS is that it is 10 times more nutricious than live baby brine shrimp and no hassle. 2 or 3 weeks after they lose the yolk sacs they are big enough to put on NLS grow pellets, then NLS small fish pellets. If you want to try some of the BBS I can mail it to you - it lasts forever - bought 200 or 250g. 6 months ago and have only used 1/4 of it and I have fed probably 6-700 hundred fry. Good luck with the fry.