One who does any type of work using a Kosher and a non-Kosher animal at the same time, deserves 39 lashes by Bet Din.
Even one who sits in a wagon drawn by an ox and a donkey deserves 39 lashes by Bet Din.
Applies to everybody, everywhere, always.
Verse: "Do not plough using an ox and a donkey" (Devarim 22:10)
Source: The Chafetz-Chaim's Sefer haMitzvot haKatzar; Prohibition 180
Thursday, 20 Marcheshvan 5771