What would you do first if someone's dog bites you?

I would say one should try to see who it belongs to before reporting, BUT in today's world,people don't like to take responsibly for their children or pets behaving badly so maybe one should just contact police first to avoid potential escalation of any conflict.

I was not bitten but could have been by a dog that ran up on me as I was trying to get into my car. It bit my bag...