phisherman,

That's probably what I would do if faced with a determined
and hungry heron. Stock the pond with feeder fish.
I'm curious if you ever tried any deterrent for the herons?

I had a heron visit my pond two days in a row and the dogs
and I were able to scare it off. Being a mom at home has its
advantages when dealing with critters, both human and nonhuman ;-)

kathy