Our neighbor's dog, Sam. He's a rott/lab(?) mix and is huge. He is aggressive to all men he doesn't know, less so to women. He hates, hates my husband and a neighbor down the street for no reason any of us, including our neighbor, can figure out. He gets out fairly frequently and is aggressive to other dogs/cats/people. The neighbor has been approached many times about this problem. Just yesterday I was walking down the sidewalk to our house, and Sam was positioned about 100 feet away from me, blocking the sidwalk, tail not wagging, staring me down. I stopped and told him to "Go home" several times to no avail (oh, he's not trained well either). I then slowly turned around, walked back the way I came and took an alternate route. Husband and I will call animal control next time he gets out. Just plain scary.

I did encounter fairly frequently on my route to work a certain Pug named Rosemary who HATED my bike. Even when I was just standing next to it, she'd bark and growl and try to bite it. She had a good owner though so eventually Rosemary just growled as she went by. She was too cute to dislike though.