I'm going to assume this is something to do with the new animal menu? Dog is bonded, owner is out taming animals, dog is tagging along. Attempted tame goes agro, owner and animal (giant sloth in this case) are duking it out..... dog is standing next to them and just walks home calmly.
Animal is set to accompany during outings, but not while 'drafted'. Pawn, however, is not drafted during fight. Not sure why the animal ignored a hostile right next to it.
If you're ~supposed~ to pause, click the follow-while-drafted, AND draft the pawn to have the animal not watch dispassionately as you get torn apart by a giant sloth... that wasn't very transparent, and I wouldn't have guessed it.
bump
Fixed, thanks.