I've feed trained crappies I have kept in an aquarium. But that was just a handful of fish. It wasn't on pellets though. It was freeze dried foods like krill. Doing that took a couple months. It was much easier and convenient to feed them mostly freeze dried food than constantly having to feed them live minnows. I suspect if worked on, continuing the process from freeze dried food to pellets could be done. I could see them switching over to pellets in a pond albeit not as likely as other species. Perhaps a learned behavior from other species of fish in your pond?
