Another thing I thought of was...we are allowed to eat from the People of the Book, correct? How do we know the meat at Jewel, Dominick's, Meijer, etc is coming from a Christian or Jewish slaughter house? That is if you're particular about that sort of thing.
Our meat isnt preserved in any way, fresh and we dont make a production out of killing our animals. Its supposed to be as quick as possible. Thats what makes sense to me.
We are but it is not recommended by majority of scholars. Only some Arab scholars allow it but even then it's iffy. They say they eat at McDonald's cuz "people of the book".. yeah right. Had too many "fights" with these people in HS and College.. it's too easy to eat out then to control the nafs, that's how I see it.
Anyways, the islamic method of slaughtering the animal is the most hygienic and least painful. Hygienic cuz the blood is drained out (one major reason) and least painful cuz when you cut the arteries, the animals becomes unconsious. The movements you see after cutting the arteries is cuz the heart is still pumping (draining out blood). We don't need studies to prove this or that, cuz we know it's from Islam and we should stick with it.
Ps: Im no expert, what I posted is what I understood...