Friends had a family farm, around 500 acres, most of it wooded. We hunted there, and my friend trapped there, and when the kids were big enough they carried BB guns there. There was always a problem with strays being dumped off, sometimes forming small packs. My buddy was checking traps one morning and a large dog, part of a pack of six that were there, growled, snarled and "attacked" him. Didn't make contact but charged and scared him enough to need to use his shovel later.
We discussed it and felt that if it were one of the kids instead of him it would have been a bad thing. That changed the way things were handled after that.
I love dogs and have had them all my life. Strays, especially large ones in packs, can be a hidden danger, to livestock, to deer and to us.
That said, on public land in the south half of Wisconsin, we have pheasant hunting. I theorize that deer that smell human scent and dog scent know they are not the ones being hunted and it doesn't affect their activities later in the day.
ChuckC