I believe my original bass stocking was of artificially fed bass. What that means is that when I stocked them they were about 1.5 inches long and I got them straight from an Arkansas hatchery fish truck. At that size I bet they had been started on commercial feed. I waited until my pond had abundant prey. I never saw them take or show any interest in the 1/8 inch pellets that I was feeding. Had they been fed out to a larger size, they may have stayed with the pellets. I also do not use a commercial feeder and only feed when I can get there. I believe they turned opportunistic and ignored the easy protien. BTW, when I asked if they were F-1, I was told that they were. No idea whether that was true.