Are there foods that dogs can safely eat but humans can't?
No, not talking about their own shit or vomit, har de har. I mean how dogs can't have chocolate, can't eat grapes. Are there things it's no big deal for them but would be toxic for us.
My dog often eats raw bones of various animals. Last month he came home with a wild boar skull which has now eaten almost entirely, aside from the teeth and tusks.
Yesterday he caught and ate an entire rabbit. There wasn't even a single hair left.
These are not things any human I know can do, safely or otherwise.