This.I love how failed stuns or shocks are always ignored when it's about kosher and halal slaughter.
When you ask the animal rights groups you learn that quite a lot of times the stun or shock fails to render the animal unconscious.
Then they obviously apply a second stun or shock.
Then there are the cases where the animal regains consciousness and isn't stunned or shocked again.
At the end of the day it's only about optics.
Kosher and Halal slaughter looks "yucky" with all the blood.
The stun or shock is clean and therefore marketable.
You can cut a chickens head off and it will run around as if it was alive.
Movement =/= consciousness
My dad worked on a pig farm and he mentioned that stunning a pig can be really hard and not at all what it's made out to be. He tried three times this once and it didn't work. He was seasoned by this time; had been at this job years.