According to manufacturer warnings freeze dried are for treats-only and should be fed just once or twice a week. Frozen is a better option. If you can find baby pellets or crush up the adult pellets, NorthFin Betta Bits, Fluval Bug Bites (for small fish), New Life Spectrum, Aqueon Color or Betta Formula (not Betta Pro) and Omega One have more nutritional value than Hikari.
I feed my filter feeder shrimp Sera Micron Nature Fry Food.
Where are our photos of these babies? We love pictures.
If you're up for it, my baby also loves live baby brine shrimp, and it's pretty fun to watch him hunt them when I release some into his tank. I bought the Brine Shrimp Direct brand dish hatchery, and it makes it super easy. Mix some water with aquarium salt, pour solution into hatchery, add eggs, and wait. They reliably hatch in roughly 36 hours, no aeration or heater necessary.
Your babies are super cute! I bet they'll grow into gorgeous adults