According to the myth, how did frogs loose their teeth ?

Grandmother wanted to eat frog leg stew so she captured a frog and extracted its teeth one by one while chanting a Winnebago song, and since then frogs were without teeth.

Frogs used to eat rocks and one day a frog ate a rock that was too hard and smashed its teeth.

Hare hit a frog with a club and burned the frog and cursed it by declaring it would never be able to harm anyone because it threatedned to hunt the hare down with dogs.

Frogs never had any teeth.