We processed 2 roos two months ago. We had gotten 13 chicks, 7 turned out to be roos. Anyway, I made a tripod of 3 tree limb poles, strapped with bungees. Hung from the center, a vinegar plastic bottle, cut open and hung upside down. Head through pouring hole. Wings wrapped around body, up through the plastic bottle. DH was able then to take his sharp knife, slice the heads off, they drained the blood in a bucket set under the tripod. Quick, and humane. Then, we processed from there.
We only got the 2 done of the 4 though. Right then, the propane single burner gas valve developed a leak, and we had to shut down operations.
Now, this dispatching didn't bother me in the least. And I am the city kid, raised with buses ..taxis..and Macy's. DH is the farmer boy from the hills of WV. I am glad he knew the process, because I only knew rudimentarily what to do.
I guess things like that don't bother me because I am the tomboy of the family..and I also worked healthcare for 6 years. Life happens. Processing livestock to eat, is part of living.