Cat or mouse, could be, dear, rabbit, bird not likely, most likely a bug of some kind. That DE over the soil could take care of it. Have any bounce sheets? Staple some of those to the table, they repel bugs.
I have had rabbit damage, they will chew down a plant for the moisture. (cut off at the ground it was).
Grasshoppers, stinkbugs, locusts, can/will devastate a crop. Millipedes will eat vegetation as well if they run out of other stuff to eat, I have lost sprout to these (and mice).