From: Rabbi Mordechai Leib Winkler
To: Rabbi Chaim Ephraim Balaiti
The question concerns Jews wishing to partner with a non-Jew to buy non-kosher animals, fatten them, slaughter them, and sell them, with the non-Jew handling all business and the Jews receiving profits from the non-Jew's earnings.
Source: Yoreh Deah I §70