Cecil, We are seeing the same thing. LMB feeding has decreased dramatically the past 10-days. BG and CC are still aggressively feeding. We also feed twice a day and haven't tried cutting back to once a day.
I hear you on the herons. The fledglings come to the ponds in pairs and are too stupid to be afraid. I have to walk within 25 yards to kick them out. We had stakes and string set up at the prime ambush points but the water levels have dropped so much that the trip wires are high and dry and we haven't reset them.