What happened to our lettuce? And our broccoli?

Saturday afternoon was my first trip to our community garden plot since returning home Friday after an overnight trip to DC. When I saw that the tips of our lettuce leaves had been broken off, I have to admit that my first thought (or maybe I said it out loud) was, "Doesn't Geoff know how to pick lettuce?" But then I saw that the tip of one of the broccoli leaves also had been ripped off. It seemed strange that Geoff would have tried to harvest a broccoli leaf. When I got home, I asked Geoff, "Um, did you pick some lettuce while I was gone?" When he shook his head, I panicked. What had gotten into our lettuce? When we planted our garden, we put up a fence around our entire plot. We even buried it and used metal stakes to secure it into the ground so that critters wouldn't be able to eat our food. When I checked my email later that afternoon, I saw that I had a message from Katherine, one of our community garden sages. She wrote, "So I was just out in the garden and it looks like a groundhog got into your garden." I felt my blood pressure rise as I kept reading. It turns out that a groundhog got into our plot through slits in our fence, probably made by the University of Michigan Northwood grounds maintenance crew who weed-wack around the fence. Katherine, who also happens to be a friend, repaired our fence for us by patching the slits with pieces of fencing material and garden-variety twist ties. I was thankful and thought that our groundhog problem had been resolved. But when I went to check on our garden this morning, I saw that the bottom of our "door" had been pushed aside and found our broccoli plant standing near-naked with its leaves eaten away. I am not happy.