Borzoi, when hunting they use them in groups. In the past. Imagine the outrage if anyone used dogs to hunt wolves today.
Anyone coursing wolves with Irish Wolfhounds would be wise to have several in case they encounter a pack. An IW can easily handle a wolf one-on-one but not an entire pack. An IW is a more robust dog than the borzoi - taller and quite a bit heavier but not as fast or agile.
I wonder if it would be legal to course wolves in Idaho or Montana where it is legal to hunt them? Probably limited to harvesting them with a firearm or bow. I hear that strychnine works really well.