You are supposed to feel bad about killing them. People who enjoy killing are sociopaths.
I do my own processing. The birds are going to be eaten, no matter what, and I want them treated with kindness and respect right up until the very end. I am grateful for their sacrifice and take a great deal of effort to make sure they are not stressed or frightened.
You know the old saying: if you want it done right do it yourself. When I do it myself, I know they are handled gently and soothed and the end is a total surprise. They are there and contented and in an instant they are no longer there. No fear.
I don't want them hauled around by their legs, or their crate dropped, or to have them treated like they are lumps that don't matter.
I do not know that the processors treat them roughly, but I know with absolute certainty that I don't.
I couldn't have said it better........