When I arrived, I heard a man yelling about something or someone named Fenton. I found them northwest on a large rock about 110 yards away. I went there, killed the wolves surrounding the sheep, and then used Eivor's whistle to bring the sheep back to the man who was looking for Fenton. Fenton did not respond to the whistle. I managed to startle Fenton and lead him with the horse to the Saxon man. Nothing happened ...
https://www.ubisoft.com/en-us/game/assassins-creed/valhalla/photomode/photo/80678cba-e950-4e82-8fd4-53646d347327
https://www.ubisoft.com/en-us/game/assassins-creed/valhalla/photomode/photo/b49b6529-595f-4cf7-aab4-ad574bc7f3b1
Same issue here: https://discussions.ubisoft.com/topic/98627/eiver-the-sheepdog-devils-hole-glitches
A comment on Reddit: "How close does fenton need to be to his goddamn owner to finish the quest" by jesper112. This is exactly my question, too?