Two Pitbulls on One Walk I've recently taken up doing evening walks (around sunset and twilight hours) because of the heat and my health. 

Today, one pitbull (not leashed) ran up to me almost in attack mode. It didn't look aggressive but it's hard to tell with these gargoyles. 

I was later sized up by a barely leashed MASSIVE pitbull walking a tiny woman that's much less massive than it. 

This is all in the span of one hour so I can definitely expect more pitbulls in my future. What should I do to give myself peace of mind?