My egg cases are still in cool storage. I usually leave them there until April. Any 'leftovers' that grow too big to use as feeders can then be released in my garden for bug control and attracting birds. The cases are really easy to collect around here, it's my one winter outing during a January thaw.
You could raise them on pinheads, fruit flies and any other tiny bugs until they're big enough to use as feeders. Newly hatched ones went over well with 1 month old chams. I've also used small mantis as food for crested and gargoyle geckos. Some of the bigger dart frogs ate them as they emerged from the egg cases, but not many Dendrobates touched them (probably too tough for their tender tongues to handle).
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