Dont know about you, but I have never even needed a knife to butcher a rabbit. Unless you are trying to be real careful with the skin for saving it, the easiest way I have to do a basic field dressing of them is to grab the back skin, over the shoulderblades, with two separate hands, and pull/twist in different directions. It tears quite easily and you simply deglove the animal. You can then just break and twist off the paws, and the neck breaks easily enough and the head twists off with that. For eviserating the animal, just push a finger underneath the breasbone, pull open the stomach muscles, reach into the chest cavity and pull out the heart and lungs, then draw down with your finger under the stomach muscles to the pelvis, strip out the intestines and other organs, rinse it out, and you are done. I can do the whole thing, start to finish without a knife, in a about a minute.
Tom