What is the ruling on eating chicken and meat in the city of Merida, Venezuela, given the doubt about the method of slaughter and the omission of the Tasmiyah (invocation of Allah's name) upon it? And what is preferable in this case? And what is the ruling on eating bread when there is doubt about the presence of butter derived from pork fat?

It is not permissible to eat from the slaughtered animals of the People of the Book unless their ritual slaughter (dhakāt) is known to be in accordance with Islamic law, because it is common for them not to slaughter animals in that manner; rather, they use electrical stunning and similar methods. If they are not from the People of the Book, such as atheists or idolaters, then it is absolutely not permissible to eat their slaughtered animals. Similarly, it is not permissible to eat if it is confirmed that Allah's name was intentionally not pronounced over it. As for bread made with pig fat, it is not permissible to eat it if it is highly probable that it contains it. If you are in doubt, the default ruling is permissibility, but piety dictates avoiding it.