Thanks everyone for the much appreciated advice. I have since tried worms, FHM and smaller HBG baits.
Still haven't seen or caught anything but CC's. CC's are really healthy and have grown a lot.

I just find it strange that the HBG and LMB could be all dead especially given the numbers that I had last year and how healthy they all were. It seems that more would have floated than what I explained in my original post.

I'll keep fishing I guess to see what's up. Last spring they were pellet feeding from late April / early May to October like piranha despite how many FHM were in the pond.

I was going to research other things like Mink or Weasel but again, there would have to be a boatload of them I would think!

I haven't seen any minnows this year yet either.

Thanks!