If the sheep are mainly drinking impure water and eating impurities, it is not permissible to drink their milk or eat their meat.
The Messenger of Allah (peace be upon him) forbade eating the meat of animals that feed on filth.
This refers to animals that feed on or drink impure substances. They are to be locked away for three days and given only pure fodder.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.