This post pertains to The Song of Hiawatha, by Henry Wadsworth Longfellow, and it contains spoilers.
I just finished this about 9–10 hours ago. I'm left with the memory of that one guy who petitioned the beavers to turn him into a beaver, and then to make him ten times as big as they were. The beavers wanted him to be their king. If they could change the size of someone, why wouldn't they make one of themselves huge? I'm guessing the reason is that it would break some symbolism (so, for the sake of the story, and not for the sake of straightforward logic).
Anyway, Hiawatha kills him in his beaver form before he can become king of the beavers (he's too big to escape). However, since he's a beaver, he doesn't really die, oddly enough—I guess he can't die for good when he's in an animal form, for some reason (and dying in an animal form changes him back or something, perhaps). Anyway, Hiawatha kills him every time, and eventually, I think he kills him in human form, too.
Later, Hiawatha's wife is dying from famine (because of some beings who are testing him or something). She dies. Now, my question is, why not have some animals turn her into an animal while she's starving—then she'll die, and, um, still be alive! But, I guess she might still be starving and this process might not make her any more full. Maybe she didn't want to die more than once—I guess that wouldn't be pleasant. But, alas, I do think it's for the sake of symbolism that the characters don't do tricky things like this—I could be wrong.