to be honest I dont know Ive never kept Bluegills, I do know that Bluegills have a smaller mouth than Green sunnies do, and eat more insects than minnows in the wild so my guess would be they would eat more worms and crickets than minnows (but I could be wrong). I pellet trained my Greens ( I believe thats the easiest and cheapest way to feed them) and then would supplement their pellets with Rosies and Scuds I bred in their own tanks. I would also buy small crickets and Bloodworms from the pet store. They got a treat a couple times a week of live food (one of the above) all the rest of the time I gave them cichlid pellets.