“Animals must be stunned first” — thereby stiffening the meat. Idiots.
You’ve obviously never worked in a packing plant. The latest stun technique is to use CO2 to cause unconsciousness and then the throat is slit.
It has ABSOLTELY NO effect on the muscles whatsoever let alone causes “stiffening”. BTW, any type of stun has virtually no effect on meat quality or consistency. It’s pretty much an old wives tale.
What actually causes the muscles to contract and the meat to potentially “stiffen” is extreme stress of the animal. Archaic forms of stunning used years ago could potentially bring on this condition.