 This may be important because the consumption of blood itself is forbidden in Islam; however, it is not clear that bleeding the animal removes all traces of blood from the carcass, so the meat may remain unclean.In fact, it is stated by Islamic authorities that it is only necessary to drain "most" of the blood from the animal.Stunning the animal with a bolt-gun, as is the standard practice in USDA FSIS inspected slaughtering houses, may cause instant death.