It's better if I just use the example that came to mind:

My mom and I were standing at the counter a couple of feet away from a lady who was at the counter as well. She had a standard poodle (although, not full grown, I don't think) on a leash. (S)He was a very friendly pooch. It wagged and ran over to us and was jumping on me and when I started to pat it on the head the lady gave me a pissy look and yanked the dog away as if I offended her or something. She was watching everything that went on, as well. She wouldn't let the poor puppy near us, after that.