I don't have any real data to prove my point but I think that many people would not like to watch how a cow is killed and transformed into steak. But nobody has problem watching as someone picks apples from a tree, or how a press creates olive oil.
As long as it's not one of those halal killings, I don't see a problem. Bullet to the head, done. I've rotated spit roast as a child and didn't find it creepy.
This is not at all how it’s done. I encourage you to watch footage of how cows are killed in factory farms.
It often takes several attempts to kill the cow, even with a bullet to the head. Their throats are often slit while they are alive. There is pleeenty of footage of exactly this in Dominion. I suggest you watch it.