Felix's yard

There is a dog named Felix who lives at a house in the neighbourhood of Ocean Park, in Surrey, British Columbia. As there is no fence in the front yard of this house, he is often tethered up on a leash to a post in the middle of the yard. Whenever a stranger walks down the street he goes wild. He barks and growls and and doesn't stop running until the intruder passes the house. As he is held back by the lead, he runs the same semi-circle back and forth, over and over. He has made a very visible path in grass which you may find relevant (and entertaining).