Hello and welcome to FF! Best food are earthworms; a generic name for segmented worms living in soil and feeding on live and dead organic matter. Night crawlers are a species of earthworm; just as red wrigglers. The first (NCs) are good, readily available food in Walmart and bait shops (use not dyed ones). The RWs are not good, because they produce a foul tasted slime, that will make frogs avoid them and even other worms after tasting them.

Crickets are OK if you gut load them with veggies (carrots, lettuce) and cherios. Dubia and other roaches are better foods than crickets with more nutrient content. Beetle worms (mealworms, waxworms, etc.) are high in fat and their chitin exoskeleton can impact smaller frogs. Small rodents can be feed but only like once a month and they should be small compared to frog's size. A large rodent can remain undigested inside a frog and decompose inside it; which could get frog sick and kill it from a bacterial infection.

For a little baby all insects should be sized same as distance between frogs eyes. You can cut the NCs from their pointy end sized same as frogs mouth. Once baby reaches 1.5 to 2 in. can cut worms same length as the frogs. 3 in. and bigger can handle whole worms.

You need to use CA/D3 and vitamin supplements, specially on growing babies. Here is more info on that: http://www.frogforum.net/food-feeder...schedules.html. For more information on Pacman's care please read this article: Frog Forum - Pacman and Horned Frogs - Ceratophrys - Care and Breeding. Happy holidays !