Hibernation?

[Stefan-A]

That would be my concern... Ain't dart frogs toxic to most predators? Wouldn't the tadpoles be toxic too?

Apparently the toxicity originates from their diet in the wild. If I remember correctly.

[Invisible Snake]

You are correct.

"It is argued that dart frogs do not synthesize their poisons, but sequester the chemicals from arthropod prey items, such as ants, centipedes and mites - the diet-toxicity hypothesis.^[22][23] Because of this, captive-bred animals do not possess significant levels of toxins as they are reared on diets that do not contain the alkaloids sequestered by wild populations. Nonetheless, the captive-bred frogs retain the ability to accumulate alkaloids when they are once again provided an alkaloid-containing diet.^[24] Despite the toxins used by some poison dart frogs, some predators have developed the ability to withstand them. One is the snake Leimadophis epinephelus, which has developed immunity to the poison."

[Boabab95]

Apparently the toxicity originates from their diet in the wild. If I remember correctly.

Yep, that's correct, while they may have the ability to produce the toxins if fed the right bugs, they are completely harmless...

[Dan72]

Apparently the toxicity originates from their diet in the wild. If I remember correctly.

That is totally correct. Raised in captivity nothing toxic about them.