Is it permissible for a Muslim to eat poultry and meat available in American markets without knowing the method of their slaughter, and is it permissible for him to work in American meat packaging factories that handle animals permissible to eat?

It is permissible to eat the meat of animals slaughtered by People of the Book if the slaughtering is done by cutting the windpipe and the jugular veins. If it is permissible to eat it, then it is permissible to work in factories that package it. However, if the slaughterer is not a Muslim or from the People of the Book, or if the slaughtering is done by electric shock, striking, or strangulation, then it is considered carrion, and it is not permissible to eat it. Nor is it permissible to work in such places, as it constitutes aiding in sin and aggression.