We went through one round of the pesky caterpillars eating the dill but it doesn't seem like the dill and cucumbers will be ready at the same time anyway so we're letting the dill go mostly to the caterpillars only keeping them off of the front two. It's a simple matter to just pick the piece they're currently eating and putting it on one of the back plants.
Maybe this time we will be able to get them before they get too big and put them in a tank to change into butterflies. The netting is still available from last time we thought about it. I still don't remember seeing the butterflies in the first place but I'm pretty sure that's what they are.