According to obligatory precaution...

According to obligatory precaution, the Nasibi and those in the ruling of a non-Muslim who are at enmity with the Ahlul-Bait of the Messenger of Allah, peace be upon them. That the instrument of slaughtering be made of iron or something from the metals resembling it.

When slaughtering is necessary and the instrument of slaughtering is not found or it is feared that when the animal is not slaughtered it will die and something of metal is not available, it is permitted to cut its throat with any other sharp instrument (like glass, stone or wood). That the front part of the body of the animal be in the direction of the Qiblah at the time of slaughtering. When the animal is faced with its back toward the Qiblah intentionally, its flesh is forbidden.

However, when the animal had its back toward the Qiblah mistakenly or out of ignorance of the rule and the issue or it was a mistake in the direction of the Qiblah and the animal was slaughtered in a direction other than the direction of the Qiblah, its flesh is not forbidden. That the name of Allah be said at the time of slaughtering. It suffices to say: Bismillah (In the name of Allah) or Subhaana-llah (Glorified be Allah) or La Ilaaha Illa-llah (There is no God except Allah).

It is sufficient that (the saying of the name of Allah) be said in Persian or any other language. However, when the name of Allah is said without the intention of slaughtering, it does not suffice. There is no objection when the name of Allah is not mentioned due to forgetfulness.

It is conditional that the animal, slaughtered has some movement, although it be that it moves its eyes or move its tail or kick its leg to the ground such that it can be known that it was alive at the time of slaughtering. The obligatory precaution is that a sufficient amount of blood emerges from the animal. Issue 907: It is permissible that the slaughterer be a male or female or an immature child knowing the method of slaughter and its rules.

However, the best is that women and children be excused with the existence of men. Issue 908: It is permissible to slaughter animals by mechanical equipment when the aforementioned conditions are taken into account. Issue 909: When a number of chickens or animals are slaughtered together, it suffices to say the name of Allah one time. Likewise, when a large number of animals are slaughtered by equipment at one time (according to other conditions), it suffices to say (the name of Allah) once.