[Redfrog]

I see no difference whether it is in the mtns or flatlands. It is legal in B.C. or was when I was there. I can't say 100% now or not.

I had a dog with me on lots of trips, mtns, heavy bush, horse , on foot etc. never had a problem.

As far as the concern about chasing a deer, it is simply training. I sure do not want a dog running after deer when I'm trying to hunt them no more than I ant a dog running willy nilly around when I'm hunting birds.

Because I wouldn't allow a dog to behave poorly, from a personal POV I don't see the down side.
I'm sure there are those who may take a dog along that is not well trained, but I think those are few and far between. I have never heard of an incident where a dog accompanying a hunter has been a problem. There are several places that allow it, but I can't recall a problem anywhere.

I know sometimes dogs run livestock, but that is a separate issue.