Also, thinking of your question about feeding the fry a little more, you could just slide your finger along the side of the flake food container and drop it in by the fry for an extra feeding. Actually two good feedings a day is not bed.

Do you have any plants, especially floating plants, in there with your guppies? That will shield the fry from Moma if she get cannibalistic (though that is unlikely after a day, unless she is really starving.). You also could hide that flake powder there. Lastly, a number of micro-creatures live on plants. Without a microscope we are not likely to see them. But the fry do. (And you just though they were bored when picking at plants!) ;)

If you have any brine shrimp (the same as sea monkey) eggs you might try hatching small batches. Both the fry and Mom will benefit from baby brine shrimp which is only a couple of hours post hatch. If you don't have any, I probably would not run out and buy some, as they are quite expensive.

Although it would be several dollars, a package of frozen food would last your female guppy (and eventually the fry as young adults) a long time. I think the best frozen foods would be bloodworms, glassworms or, if the others aren't available, brine shrimp. In all cases break off (if it doesn't break try a hammer gently over concrete or thin-nosed plyers) a tiny piece. Defrost it in luke-warm water and rinse it off before feeding the female. She will appreciate the extra protein and the change of diet. That will further insure that she leaves the kids alone. It may also help her body prepare more eggs which can be fertilized (by sperm she has stored from her last mating) and delivered as fry. Sometimes if the females are eating better, the fry may even be a wee bit bigger and more robust.

Was reading (on another list) a post by a killie breeder who I look up to. Unable to secure a reliable supply of live food, he discovered frozen blood worms. When he made the defrosted/rinsed bloodworms (actually a vegetarian insect larvae) one of his killie daily feedings, he began to discover fry living with the adults of about a dozen species of killie that had never tolerated fry in their tanks before. Keeping egg-layer fry with the parents, even with killies, is a little to a lot harder that keeping livebearer fry with the folks. He found the trick easier just with an increase in meaty foods. Livebearer enthusiasts have found that more fry also magically survived with the adults when there is a daily feeding of frozen or live foods and some shelter in the aquarium.

When time permits, please check out the Immediate Help links on fry, foods and plants. You may know a lot of what is there, but something new and useful should pop up.