Flexi-leads, dog reactivity and narrow corridors. That will wind up as a dog fight, like... tomorrow. 
Maybe you could gently hint that they get a regular lead and some sort of walking aid for their dog. Say you saw a dog fight this one time that started exactly the same way. That's usually the tack I take so that I don't come off as a condescending know-it-all.
Maybe you could gently hint that they get a regular lead and some sort of walking aid for their dog. Say you saw a dog fight this one time that started exactly the same way. That's usually the tack I take so that I don't come off as a condescending know-it-all.