Is working in a pet food store that may contain pork orZabiha-unlawful meat permissible or forbidden? If it is forbidden, what should be done with the money earned from it, and is it permissible to keep it due to ignorance of the ruling on this work?

If your work involves selling or transporting pork, then it is not permissible. This is because when Allah forbids something, He also forbids its sale, its price, and working with it. This is considered assisting in sin, and the money earned from it is forbidden. It must be disposed of by spending it on the welfare of Muslims, unless you were poor and in need, or ignorant of the prohibition, in which case what has passed is yours. However, if the work in this place is limited to permissible matters, then it is permissible, and the wages earned from it are permissible.