It is widely accepted in Islam that there is not even one sin, which when committed, will take you out of the fold of Islam and cause you to be branded a kafir or disbeliever. This includes sins such as drinking alcohol, fornication, adultery, as well as other major sins. Rather it is ones disbelief, which as the name implies, causes one to become a disbeliever. An example would be saying that alcohol is allowed, and denying the verses Allah has revealed in the Quran regarding the prohibition of intoxicants. In this case the person has made halal what Allah has made haram, and rightfully deserves the title of kafir.
By: Shaykh Yusuf Badat
Based on the verses of the Qurʾan and prophetic reports, animals will be resurrected on the day of judgement, justice will be manifested for them, thereafter they will be made to dust. Refer to the below mentioned source texts:
“There is no creature moving on the earth, nor a bird flying on its two wings, but they are all communities like you. We have not missed anything in the Book. Then, to their Lord all of them shall be gathered.” (Qurʾan 6:38)