I am afraid dog owners are a cross section of society. Many are very polite and do all they can to make sure their canines are not a problem to others. At other end of the scale if the trophy dog etc whose owners will not take any notice of rules or polite requests.
We should have more dog wardens who can shoot any dogs not on a lead at all times , accept in the persons home or fenced garden
Why did we get rid of dog license. 7/6d was something all could afford.