There is a place called Plucky Poultry right outside of Martinsburg, OH. It is just north of Newark. Their phone number is 740-668-4573. I have had several friends take their chickens there, and they swear by it! Not expensive at all, and 12 chickens took about 45 minutes. They even can sell you the bags to put them in and the ice to pack them home. Good luck!
In case anyone else is interested I just called they are closed until May and it's only $2 for any chicken under 11 weeks. Just call to make an appointment.