I've raised rabbits, for harvesting I just grab both hind legs with one hand, lift up, the back of the head with the other and pull down. The problem I have with rabbits is the amount of time and effort compared to the amount of meat you get for it. They are easy to raise though if you do it right, simple raised from the ground cages, with mesh area for their poo to fall through, a decent area for them to get some exercise, and thats almost it (well besides eating drinking, etc. of course.) and they breed like...well, rabbits. Grow your own food for them and you can feed them tons of what we'd normally even waste and it'd be fine.