The Dog and the Oyster

Fables by Aesop

A DOG, used to eating eggs, saw an Oyster and, opening his mouth
to its widest extent, swallowed it down with the utmost relish,
supposing it to be an egg. Soon afterwards suffering great pain
in his stomach, he said, "I deserve all this torment, for my
folly in thinking that everything round must be an egg."

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