The dog who lurks

I discovered this dog while I was hanging towels at my job at the hairdresser, I am an assistant. The vet woman next door said that it was an abandoned dog and were searching for a home for it. While I was folding the towels the dog was staring into the shop through the screen door and howling. I told the boss about the howling dog and we went to the door to investigate. Upon opening the door, the dog ran in and confronted the clients for attention and while doing so scattered their hair all over the carpet. I was ordered to apprehend the beast and escort it back outside where it began once again to howl. I then vacuumed the carpet.

powerful and muscular dog

This dog mostly roamed around with his head down shaking a chewed coke bottle. There were many people standing around the courtyard and It would at times look up and approach the people with the chewed coke bottle in its mouth and a challengey look in it's eye.
I accepted the dog's challenge and on a few occasions defeated the dog. This video depicts the dog defeating me even though I could have easily defeated the dog again, my superior intellect and tactical prowess was bewildering to the largely instinctual creature.