If you have an un-neutered male dog, please keep him on the leash

It has become stressful for me to walk on Montara Mountain with my dog because half the time we are there, we encounter the same male german shephard that is un-neutered, and every time he attacks my dog.  I feel like I always have to be on guard.  The owners assure me that it’s something about my dog and that he attacks no one else, but I recently heard from my neighbor that he’s had the same experience.

Having an un-neutered male dog is a big responsibility, and I would appreciate not having to always be on the defense when I’m walking in my neighborhood.  Just now, this dog came aggressively bounding down the street after my dog (who was leashed) and I didn’t even see the owners.

Thanks.