Suddenly I heard terrific growling and barking as the brown dog attacked the black one. The owner of the black dog kicked out at the brown one, whose owner rushed towards where they were fighting, and prized them apart.
Owner of brown dog then started shouting and swearing at the owner of the black dog for having kicked his dog. Owner of black dog shouted back 'your effing dog was attacking mine, what do you effing expect me to do'; etc, etc. I'll spare you the worst of it.
The argument escalated to where fists were proffered, and pugilistic stances adopted. Luckily a lady dog-walker stepped in, and the two men parted whilst still effing and blinding at each other as they walked away. For a moment I thought they were going to begin throwing punches; it was quite dramatic.
I witnessed all this from a distance of about 30 metres. Never a dull moment, eh?