At the Hayle Estuary RSPB reserve, Cornwall, we have had a constant battle with a few irresponsible individuals whose dogs are allowed, encouraged even, to run around the Nature Reserve chasing birds.  The owners are not oblivious to the disturbance their pets are causing and we have signs dotted around the perimeter asking people and their dogs not to venture out onto the estuary as this SCARES THE BIRDS AWAY. Usually…