This just infuriates me! Why do people constantly allow their dogs to roam without being leashed? An owner might trust it's dog and thinks they know their dog...but a human can NOT predict what a dog MIGHT do in EVERY circumstance.....big dog OR little dog...
The sad thing is that it is always a little dog or a human that pays the price....for an owner's lack of responsibility.....Every dog that is not is it's own - fenced back yard should be on a leash!! Simple really!
I have many times taken my Yorkie to the park - only to find other dogs running around unleashed....I take no chances...I pick my dog up and leave!
If I were to get close enough to the other dog owner...I would have no problem telling them that their dog should be on a leash...after all..it is the law!