Haha, interesting topic for me, as I've been riding with whippets, lurchers, staghounds since the late 80's. Even used to skateboard with 2 of them at once, that was fun, lol. Definitely got scabbed up a few times.
I use a harness on the pullers (from sled huskies) ....but most get it after a while and stop pulling too hard. But, the dogs absolutely love it....I just touch my bike, and they light right up with joy. I think it's almost as good/fun as chasing quarry for them.
In town, always on a lead, and in the bush, off lead 100% of the time, they just love single track....if you