tim k, I think it's safe to say both Theo and I realize your pond will not get nearly as cold as ours do. Your BG may stop and start feeding at different temps than ours. And what FishinRod has written about experimenting with feeding is spot on.

Maybe instead of running your feeder, try hand throwing some food so as to not overload your pond with uneaten pellets.
Try a few spots around the pond. My fish fed fairly well today, considering the pond was completely frozen over this morning and thawed about 10. In Fall my BG stop feeding when the temp of the water drops below 48 degrees. The water was not even close to 48 this morning when BG showed up looking for food.

Are your BG northerns or coppernose? I can't tell you if that makes a difference in food acceptance.