OH yeah - I will also harvest some of the larger YP as Brucd suggested. I have tried tossing in some pellets (TSC) but the YP have shown no interest. The BG eat some but are not really very interested in the pellets either. Often the swim right up to a pellet and decide not to take it. Other times they take it and spit it out.
My back up plan (next year) would be to add some LMB but I would prefer not too - rather have the SMB. I have 4 LMB in my small pond that are around 10-12" last I saw one 2 months ago. How hard is it to determine the sex of LMB? I could put in either only male or only female if I was very confident of my ability to sex them.