What if the big dog in the community runs around without a rope?

Yes, I hate it, too. Don't say big dog. Puppies are not liked. Although they are all vaccinated, it is not a good thing for animals to be bitten after all. It's not terrible to have dogs living in the community. Property has the right and obligation to take care of it. If not, there are regulations in the city that prohibit raising large dogs, let alone stocking them. You can also call the police. If the police tell you which department to go to, such a thing can be enforced. The sooner this matter is solved, the better. But the dog turned around. You are a stranger.