Rabbits Like Sweet Potatoes?

Rabbits like sweet potatoes?  Yes, yes they do and they decided they really liked the ones in the orchard.  When George had gone down to the orchard yesterday he noticed that green leaves of the sweet potatoes were all gone.  It appeared that the rabbits decided it was a tasty meal.  Since potatoes grow under the ground we are hoping that eating the leaves did not damage the growing plants in the ground.  Time will only tell.  Now it's time to figure out how to keep the rabbits from the rest of the crops.  Hmmm, any ideas?