help me red eyed tree frog.

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I'm Korean so my English is not good.

I imported three red eyed tree frog at friday.

They slept almost 2days, and finally a female hunted crickets.

I thought they need adapting time, so other frogs will adapt soon and begin to eat.

but one frog died yesterday. Before it die it looks like feel death throes.

The other one dying now, and he also feel death throes.

Their bodies are very thin.

What is problem?

I think importing stress and anorexia occurred together.

If I fore fed them, they can survive?

Thank you.