Since I am from the south, I have no experience growing yp so I can only pass along what I have seen at my place when feeding fish. A couple yrs back I bought a bag of Cargills that's was a different size from my normal Cargills feed. Added it to my feeder and shortly after that I started seeing some small 3" cnbg dead and floating and like you I could not figure it out. And then I was watching as the feeder went off and saw some fish float to the top and act as you described. It took me awhile but I discovered the fish were choking on that sized fish food. And you said bait was rolled into a ball. It might be they are getting too big of a bite and choke on it. Hay, it may sound crazy but think about the larger sized fish that choke on too big of a sized forage fish and they choke and die. I have seen that at my pond also. At my pond the HSB, Northern LMB and my CNBG are all very aggressive when I feed them. I can see where a yp might be the same. And a soft hydrated ball of feed is there and they attack it and get too big of a bite and choke. I would stop making the ball and feed it as it comes in the bag and see if it changes things.
Last edited by TGW1; 06/15/19 06:49 AM.