السَّلَامُ عَلَيْكُمْ وَرَحْمَةُ اللهِ وَبَرَكَاتُهُ AhsanaAllahu ilaykoum Is rennet, thus cheese, halal if we don't know how and if the animal was slaughtered? JazakAllahu khayran

There are two sayings regarding rennet: 1. Shaykh al-Islam Ibn Taymiyyah (rahimahullah ta'ala) sees that it is pure, even if it was taken from mayta (carrion). 2. The other opinion is that it is impure, as al-Imam al-Nawawi (rahimahullah ta'ala) mentioned. If there is something impure in it, like mayta or that which is not slaughtered the Islamic way, then it is forbidden.