I live at the bottom of a lane popular with dog walkers. I have gates which are closed when I'm at home.
A guy I know from school lives at top of lane and walks his two labs past my house.
Couple of weeks ago my DD (6) and I were saying goodbye to her play date outside the gates. He walked past with dogs off lead and we briefly chatted. As he went to walk away one of the dogs went for DD. It caught her arm but didn't bite her, more like he mouthed her. No marks etc but she was hysterical 
Dog owner was embarrassed and apologetic. DD calmed down and was ok.
I'm puppy sitting for a friend. Took her for a walk half an hour ago and passed owner and dogs again. I tried to keep puppy away and just as I went to pick her up same dog went for her. She howled and I had to literally drag her off other dog. Owner seemed non plussed and tried to keep me talking but I just wanted to get home.
I've checked puppy over she has no wounds but is quiet.
So AIBU to be now scared of this dog. Not a huge problem for puppy as she goes home in two days and I'll walk her elsewhere. But this dog goes past my house daily and what if it attacks something/someone else?
Should I do something? If yes what?