Grey Heron

There were 4 Heron, 1 coot two crows and an idiot today. The 4 heron were the same ones as yesterday (the shot is the little female). The crows and the coot all got biscuits. The idiot wat standing about 10ft away from me watching with his dog on a lead. He then proceeded to take the dog of the lead and let it chase the Heron. The heron are used to it and flew further up the slope and waited for me. I got to ask myself why do that?