In my humble opinion, having both rabbits and deer, we watch our "pet" rabbits almost every second day, and they virtually only eat weeds, although clover is plentiful! They have been inside our many fences and still ate the same fare. Deer, however, another matter, and if you are missing hostas, apple tree limbs, lilies, tomato tops, you know it is deer. Here at least, our rabbits could not stand up on their hind legs to eat anything and keep their balance. (kinda like me) LOL. We personally do not have woodchucks here where we are, but our friends 60 miles away do, and they claim that same just chew the tops off everything there is in their garden, everything! ( They trapped 5 of them and relocated them 20 miles away. Two days later, there was another one in the same lodge. When they trap this one and relocate, they will put a little dye marker on the fur, to see??? However, I am in agreement with so many others who have pointed to Deer as the culprit. Look for hoof marks! I just went out and photographed the tops of my plants that had been lopped off by deer, including daylilies. Looks Identical! Cheers!