The Kosher/Leviticus way of slaughtering animals is the most humane.
Talk about a blood-letting.
Like hell it is. It was the most efficient way 3000 years ago. I've seen religious slaughter, be it "Kosher" or "halal" (same thing)
Bleeding an animal to death isn't the best way. And, it doesn't make it taste better either. That's a MYTH. Only properly hanging and curing your meat for a number of days can accomplish that.
The heart doesn't pump all the blood from the meat as this ritual slaughtering implies it's supposed to do.
If there is anything I hate is this "sochet" ( jewish butcher) myth of so called "humane" animal slaughter.
Call it what it is, a religious ritual.
A pneumatic bolt in the head is instant. Shackling an animal and slitting it's throat, and watching it thras around till it dies, ( it's lifted by the hind legs as just after the sochet makes his cut) is NOT the best way of doing things.