I read somewhere that an average dog can pull @3x its weight, which is better than the average human.
Well, last night, my doggies proved it: the 2 of them together are about 100lbs. I weigh @260lbs. I was out on a walk with them, and I had them sitting on the grass for a moment to let someone and her dog pass. I did this because they're both having aggression issues with other dogs (mainly) and sometimes with certain humans.
Well, the woman's dog...well, more of a mop, really...decided to say something in our direction. It set my dogs off: suddenly, I found myself sprawled in the ground as they lunged. I still had their leashes attached to me, and I actually managed to grab one by the harness, but the younger one was more elusive, and was actually at the limits of her leash, barking her head off at the other dog.
After I reeled her in, I had them both pinned to the ground alongside me. We stayed there for about 10 minutes while other people passed though the neighborhood on foot, bike, skateboard or in cars. Every time they so much as twitched, the harness got a shake and a "No!" command.
Professional training is obviously in order.
In fairness, it had been a rough walk for them considering their issue: we encountered no less than 10 other dog-walking groups- some more than once- and a cat. So by the time this woman & dog was spotted- on our side of the street!!!!- they had already had a lot of stimulus.
No excuse, though. No excuse. Gonna talk to their vet in the next few days.