What is cutting the leaves off my garden plants?

I have veggie garden with various peppers and sweet potatoes. Over night, several of the plants had their leaves cut off near the stem. I don't think it was a rabbit since the leaves were not eaten, just left on the ground. I do not have fence, but did put some coyote urine around the garden to keep rabbits away. Any ideas of what it could be? I'm thinking insect or bird. Also how to do stop it going forward? Thank you (Also the plants were not uprooted)