6 month old bit a runner
I've been working really hard to socialise my girl since we live in the city and have a lot of people and dogs around all of the time. Since she was 2 months she's been going school parties to meet kids, the park to play with people and dogs, and just being out and about in the neighbourhood saying hello to EVERYONE. She is more interested in dogs than people but she will say hi to people if they come give her a pet. Anyways, today we were walking with a large group of dogs that always meet up in the park and a runner ran through the pack. She has always sees runners and never pays attention to them so I didn't even pay attention but then the woman started yelling and saying she had bitten her on the bum. As I didn't see it I don't know how severe it was but she didn't tear her shorts so I imagine she didn't break the skin. The other owners I was with seemed to think it was funny more than anything but I was horrified.
What I want to know is whether or not you think this just puppy behaviour that happened because she was in a playful mood with other dogs or if you think this is a serious aggression problem. I don't know if I am over or under-reacting right now.