when you first got your fish, how did you confirm that they were in there okay over the winter?
I feel for you...There have been a few times I wish I could drain the pond just to see what's going on in there! And, I would have, but I don't have a holding tank big enough to store the water and refill it afterwards. LOL
I like Sunil's idea of feeding even though my fish don't feed real well...at least I know there in there.