I was nipped in June, so yes they will get you. Sometimes they do just want to run with you. I have an ankle-biter sized dog that regularly likes to chase me on one route. I miss him when he's not there.

As to chows, there was one that would come charging down from his home up on a hill, sounding like he was going to eat me up. I shout out, "Hello Puppy!" He sits down. Too funny.