As for meat...

As for meat, fat, and their extracts, there are specific rules that will come later on. It is not necessary for the Muslim to question the person who prepared the food about his beliefs or disbeliefs, or whether or not he had touched the food, even if that inquiry is very convenient and natural for one who wants to ask.

In short, all kinds of food with the exception of meat, fat, and their extracts are permissible for a Muslim, even if he doubts that it might contain something which is forbidden for him to eat or doubts that its cook —whosoever he may be— had touched it with wetness.

(See the question-answer section below.) Just as it is not obligatory on him to inquire about the ingredients of such food to ensure that it is free from what is forbidden to him, it is not obligatory on him to ask the cook whether he touched it while preparing the food or after it.

All kinds of packed food with the exception of meat, fat and their extracts, are permissible for a Muslim, even if he doubts that its ingredients might contain what is forbidden for him or even if he doubts that the cook —whosoever he may be— had touched it with wetness. It is not obligatory on him to inquire about its ingredients to ensure that it does not contain anything that is forbidden to him.

A Muslim is allowed to buy all kinds of halal meat from a Muslim shopkeeper who sells it to Muslims. Such meat would be considered halal even if the vendor belongs to a school of thought which have different conditions for slaughtering from ours as long as there is a possibility that the animal was slaughtered in accordance with our conditions. This latter statement applies to all conditions except the one that says that the animal’s belly should be facing the qiblah at the time of slaughter.

Not observing the condition of qiblah because the slaughterer’s school of thought does not consider it a necessity will not detract from [the permissibility of the meat]. If a Muslim knows and is sure that this meat is from an animal which is permissible for Muslims to eat (like cow, sheep or chicken) but that it is not slaughtered in accordance with Islamic laws, that meat is to be considered mayta. Mayta is not permissible for a Muslim to eat even if its seller is a Muslim.

Similarly, such meat is impure ( najis ) and would make other things impure, if it comes into wet contact with it.