I fully sympathise mate, same sort of thing happened to me before, I've got a rotty and a staff that are never on leads so they can have a good run around, one day a springer came up to the staff, I didnt see what happened but all hell broke loose, i know it wasn't any of my dogs started it but they were finishing it |Ruby (the Rotty) got involved and they sorted the f**kin thing out.the Spaniel was out of control which is probably why he had a muzzle and lead on, but of course the owners completely blamed me as if it was my fault!!they didnt even help to pull away my dogs so i was struggling