You could easily process 20+ birds that way, if you had the desire (and the cage space). Will you be plucking them or removing skin (and feathers) at the same time? I remove skin and feathers at the same time, then cut the leg quarters off of the carcass, and then the breast quarters. That leaves me with a carcass with only the meager back meat and the internal organs. I like the heart and livers so I open up the carcass (very easy to do without all the meat in the way), and grab the bits that I want, then "dump" the offal into a the bowl that I used for the feathers and skin, for later burial. Rinse the carcass and simmer for several hours, then freeze the cooled chicken stock in 1 cup portions in zip lock baggies. Cooled bones are thrown out to the chickens to pick clean, and then later the dogs are let out to finish what the birds did not. As hard as dispatching your birds can be for you, the angst should be softened by knowing that you'll give them the same respect and kindness in their deaths as you gave them in life. Blessings.