When I had guppy fry I gave them freeze dried bloodworms, but I crushed the worms up first.
Also, I wouldn't give it to them everyday, I gave it to my fry once a week as a treat
And I did the same thing with the adult guppies, but I gave them the whole worm, I didn't crush it up for them
I fed my guppies flakes, and freeze dried blood worms once a week. For the guppy fry, I just crushed up the flakes that I used for the adults, and made it look like powder and fed them the flakes 5-6 times a day They turned out to be gorgeous guppies