My pbass was eating feeders and frozen bloodworms up until it was around 5". It was then that I noticed it wasn't really eating the bloodworms anymore. The weekly dozen rosies he and my oscar shared must not have been doing the trick because one day i was dropping in some massivore for my o and the pbass just started nailing them. This leads me to believe that starvation is not necessary, but underfeeding might just do the trick. Now, my bass is around 8-9" and prefers pellets to feeders! Its favorite is massivore but it will take anything that is large enough and makes a splash when it hits the water. And the pellets definately are great for color. Drop them close, where your bass can see them drop, because my bass stopped eating off of the bottom at the same time it stopped eating the bloodworms. Good luck!