Not sure. I just let them bleed out on the ground and it snowed 2 feet the next day. I did it away from the other chickens, as they would have been all over that blood, which would have disturbed me.Do you think it helps the bird at all having the bag over it....saw a video once where the lady would do the slash and then lower them into a trash can that had a black trash bag in it...she seemed to think the darkness made the chicken more calm during the death process.
They were all over the plucking area.. Savages!