I can’t imagine a border collie going toe-to-toe with a deer and not needing at least some stitches.
Chain the dog, that's your responsibility — but I doubt the story. House dogs usually don't have the need to feed wild. Chase yes, but not to feed. Dogs running deer is pretty common, the local game warden usually can handle that, catching one, different story. If they corner the deer, they just bark alot.
Pictures please ... Wolves hunt in packs for a good reason. And even then, when they get a healthy deer trapped, there is no certainty the wolves will win the battle without loss.
We trained our 'wind dogs' by letting them feast on the deer. But of course that was after someone had shot it first.
> I cant imagine a border collie going toe-to-toe with a deer and not needing at least some stitches.
Hmmm... It would depend on the deer, ay. Border collies are very smart and agile, and deer are none too bright. I can almost imagine it, if several border collies were to work as a team. Still, the BS detector is humming away here...