Animals have legs, and so it seems do terms for animals. Bulls in particular: Hebrew šūr (שור), Arabic θaur (ثور), Sanskrit sthūra, Greek ταυρος, Latin taurus, Russian туръ, Gothic stiur. Is there any way to know who took what from whom, and when? The odds against mere coincidence are long.
Is it even possible that Hebrew baqar (בקר), Arabic baqar (بقر) derive from Latin pecus/pecora, meaning either cattle or property in general? (In this case, Sanskrit, Baltic, and Germanic cognates based on *PEK’U rather than *PEK’OS seem to rule out the reverse direction.)