I transplanted some cabbage about a month ago (after starting it from seed in a flat).  Now I see that something is eating the cabbage leaves:

![Cabbage Image #1][1]

I also see that one pair of seedlings is doing very poorly:

![Cabbage Image #2][2]

What is eating these leaves?  the lettuce growing next to the cabbage appears unmolested. I have seen a rabbit or two in the neighborhood, but I don't think a rabbit would cause this kind of damage, would it?

And what (organic) options do I have to protect my cabbage?


  [1]: https://i.sstatic.net/Fvpoz.jpg
  [2]: https://i.sstatic.net/EGI7r.jpg